{"product_id":"caplugs-300-3900-b20-cryosure-cryogenic-vial-caps-hdpe-blue","title":"Cryo Vial Caps, Screw Caps, HDPE, Blue — 300-3900-B20 | 200\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eCryoSure® Cryogenic Vial Caps, HDPE, Blue — 300-3900-B20 | 200\/Bag\u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e\u003cth colspan=\"2\"\u003eQuick Reference — 300-3900-B20\u003c\/th\u003e\u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eSub-brand\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eCryoSure® (Caplugs® Evergreen)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCap Type\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eScrew cap — cryogenic vial thread\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eBlue\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCryo Rating\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ LN₂ vapor phase (-196°C) and immersion\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCryo Storage\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e✓ -80°C ultra-low temp and -196°C LN₂\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eColor Use\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eBlue caps mirror the CLSI H3 blue-top citrate convention — d\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePack Size\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e$17.71 \/ Bag ($0.0886 \/ cap)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eTechnical Narrative\u003c\/h2\u003e \u003cp\u003eThe Caplugs® Evergreen CryoSure® is a blue HDPE screw cap for CryoSure® cryogenic vials — engineered specifically for cryogenic biorepository storage at liquid nitrogen vapor phase (-196°C) and immersion temperatures, and ultra-low temperature mechanical freezers (-80°C). Standard HDPE tube caps from the 300-3010\/300-3532\/300-3541 families are rated for -80°C storage; CryoSure® caps extend the cryo rating to -196°C LN₂ — the additional engineering required for the extreme thermal contraction at liquid nitrogen temperatures that can fracture standard HDPE thread geometry and allow cryoprotectant evaporation loss over long-term LN₂ archive. Blue caps mirror the CLSI H3 blue-top citrate convention — designating citrate-preserved biobank specimens in CryoSure® vial cryo archives.\u003c\/p\u003e \u003cp\u003eHDPE CryoSure® caps combine the chemical resistance required for cryogenic vial applications — DMSO cryoprotectant at standard concentrations (5–10%), freezing media (FBS, glycerol, Bambanker), and standard biobank buffer formulations — with autoclave compatibility at 121°C for pre-sterilized cap supply. The 200\/Bag format is the trial-size entry point for laboratories evaluating CryoSure® caps before committing to bulk 1000-count orders — available for all nine colors at $17.71\/bag.\u003c\/p\u003e \u003cp\u003eAt $17.71 per 200\/Bag — $0.0886 per cap. Bulk 1000\/Bag packs available for selected colors: 300-3900-DG2K (Dark Green, 1000\/Bag); 300-3900-G2K (Green, 1000\/Bag); 300-3900-R2K (Red, 1000\/Bag). See the complete color table above.\u003c\/p\u003e \u003ch2\u003eTechnical Specifications — Caplugs® Evergreen \u003c\/h2\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eSpecification\u003c\/th\u003e \u003cth\u003eValue\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003ePart Number\u003c\/td\u003e \u003ctd\u003e\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCaplugs Item #\u003c\/td\u003e \u003ctd\u003e3003900B20E1\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eSub-brand\u003c\/td\u003e \u003ctd\u003eCryoSure® (Caplugs® Evergreen)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCap Style\u003c\/td\u003e \u003ctd\u003eScrew cap — CryoSure® vial thread\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eMaterial\u003c\/td\u003e \u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eColor\u003c\/td\u003e \u003ctd\u003eBlue\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCryo Rating\u003c\/td\u003e \u003ctd\u003eLN₂ vapor phase and immersion (-196°C)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCryo Storage\u003c\/td\u003e \u003ctd\u003e✓ -80°C and -196°C compatible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAutoclave\u003c\/td\u003e \u003ctd\u003e✓ Compatible (121°C \/ 15 psi)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003ePack Size\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBPA\/Phthalate\u003c\/td\u003e \u003ctd\u003eBPA-free; no phthalate plasticizers\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCountry of Origin\u003c\/td\u003e \u003ctd\u003eMade in U.S.A. (California)\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eCryoSure® Cryogenic Vial Cap Application Compatibility\u003c\/h2\u003e \u003cp\u003eCryoSure® caps fit CryoSure® cryogenic vials for:\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eApplication\u003c\/th\u003e \u003cth\u003eUse \/ Storage\u003c\/th\u003e \u003cth\u003eNotes\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eCryogenic vial capping\u003c\/td\u003e \u003ctd\u003eCryoSure® cryogenic vials (Caplugs® Evergreen)\u003c\/td\u003e \u003ctd\u003eHDPE cap engineered for -196°C LN₂ vapor phase storage\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eLiquid nitrogen vapor storage\u003c\/td\u003e \u003ctd\u003eBiobank LN₂ vapor phase archive at -196°C\u003c\/td\u003e \u003ctd\u003eHDPE cryo-toughened for vapor phase cycling without cap fracture\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eLN₂ immersion storage\u003c\/td\u003e \u003ctd\u003eLiquid nitrogen immersion cryogenic archive\u003c\/td\u003e \u003ctd\u003eHDPE resists direct LN₂ liquid phase contact\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e-80°C mechanical freezer\u003c\/td\u003e \u003ctd\u003eUltra-low temperature biorepository -80°C\u003c\/td\u003e \u003ctd\u003eHDPE maintains thread engagement through -80°C cycling\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eBiobank specimen archiving\u003c\/td\u003e \u003ctd\u003eBlood, tissue, cell line biobank caps\u003c\/td\u003e \u003ctd\u003eColor-coded caps enable visual specimen-type routing in cryo boxes\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eColor-coded cryo routing\u003c\/td\u003e \u003ctd\u003eMulti-specimen cryo box organization\u003c\/td\u003e \u003ctd\u003e9 cap colors map to specimen type, donor cohort, or date batch\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eLong-term archive replacement\u003c\/td\u003e \u003ctd\u003eReplacing caps on existing cryo vials\u003c\/td\u003e \u003ctd\u003e200\/Bag trial size and 1000\/Bag bulk formats available\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eClinical biorepository\u003c\/td\u003e \u003ctd\u003eHospital biobank, transplant program tissue bank\u003c\/td\u003e \u003ctd\u003eHDPE CLSI-convention colors for clinical specimen routing\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003cp\u003e\u003cem\u003eAlways validate cap-to-vial thread fit with a sample. CryoSure® caps are specifically engineered for LN₂ temperatures — do not substitute standard HDPE tube caps for LN₂ archive.\u003c\/em\u003e\u003c\/p\u003e \u003ch2\u003eChemical Resistance — High-Density Polyethylene (HDPE) — CryoSure® Grade\u003c\/h2\u003e \u003cp\u003eCryoSure® HDPE maintains thread integrity and chemical resistance from +121°C autoclave through -196°C LN₂.\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003eReagent \/ Condition\u003c\/th\u003e \u003cth\u003eCompatibility\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003eLiquid nitrogen (-196°C)\u003c\/td\u003e \u003ctd\u003e✓ CryoSure® grade — vapor and immersion phase\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eStorage at -80°C\u003c\/td\u003e \u003ctd\u003e✓ Excellent — HDPE cryo-toughened\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAqueous buffers \/ cryoprotectants\u003c\/td\u003e \u003ctd\u003e✓ Excellent\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eDMSO (cryoprotectant)\u003c\/td\u003e \u003ctd\u003e✓ Good — standard cryo media concentration\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eShort-chain alcohols\u003c\/td\u003e \u003ctd\u003e✓ Good\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eAutoclave (121°C)\u003c\/td\u003e \u003ctd\u003e✓ Compatible\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eConcentrated organic solvents\u003c\/td\u003e \u003ctd\u003e✗ Not recommended\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eComplete CryoSure® Cap Color Range\u003c\/h2\u003e \u003cp\u003eAll colors identical HDPE cryo specification. 200\/Bag trial packs and 1000\/Bag bulk packs available for selected colors:\u003c\/p\u003e \u003ctable\u003e \u003cthead\u003e\u003ctr\u003e \u003cth\u003ePart Number\u003c\/th\u003e \u003cth\u003eColor\u003c\/th\u003e \u003cth\u003ePack\u003c\/th\u003e \u003cth\u003ePrice\u003c\/th\u003e \u003c\/tr\u003e\u003c\/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e300-3900-020\u003c\/td\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003ctd\u003e$17.71\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e\u003cstrong\u003eBlue\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003ctd\u003e$17.71\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-DG2K\u003c\/td\u003e \u003ctd\u003eDark Green\u003c\/td\u003e \u003ctd\u003e1000\/Bag\u003c\/td\u003e \u003ctd\u003e$81.98\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-E20\u003c\/td\u003e \u003ctd\u003eOrange\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003ctd\u003e$17.71\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-G20\u003c\/td\u003e \u003ctd\u003eGreen\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003ctd\u003e$17.71\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-G2K\u003c\/td\u003e \u003ctd\u003eGreen\u003c\/td\u003e \u003ctd\u003e1000\/Bag\u003c\/td\u003e \u003ctd\u003e$84.87\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-L20\u003c\/td\u003e \u003ctd\u003eLavender\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003ctd\u003e$17.71\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-R20\u003c\/td\u003e \u003ctd\u003eRed\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003ctd\u003e$17.71\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-R2K\u003c\/td\u003e \u003ctd\u003eRed\u003c\/td\u003e \u003ctd\u003e1000\/Bag\u003c\/td\u003e \u003ctd\u003e$84.87\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-W20\u003c\/td\u003e \u003ctd\u003eWhite\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003ctd\u003e$17.71\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-Y20\u003c\/td\u003e \u003ctd\u003eYellow\u003c\/td\u003e \u003ctd\u003e200\/Bag\u003c\/td\u003e \u003ctd\u003e$17.71\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e300-3900-Y2K\u003c\/td\u003e \u003ctd\u003eYellow\u003c\/td\u003e \u003ctd\u003e1000\/Bag\u003c\/td\u003e \u003ctd\u003e$84.87\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch2\u003eLaboratory Applications\u003c\/h2\u003e \u003cp\u003eCryoSure® serves biobank and biorepository programs archiving cryogenic vials in LN₂ vapor phase and immersion; cell biology programs cryopreserving cell lines with DMSO; clinical biorepository programs (transplant tissue banks, cord blood banks, fertility clinics); and any program requiring color-coded HDPE cryo vial caps rated for -196°C LN₂ storage.\u003c\/p\u003e \u003ch2\u003eU.S. Manufacturing, Quality \u0026amp; Institutional Procurement\u003c\/h2\u003e \u003cp\u003eEvery Caplugs® Evergreen lot is precision-molded at our California manufacturing facility. We supply reference laboratories, hospital systems, and federal procurement offices under institutional pricing programs. \u003ca href=\"#request-sample\"\u003eRequest a free sample below\u003c\/a\u003e to validate fit before committing to volume.\u003c\/p\u003e \u003ch2\u003eFrequently Asked Questions — Caplugs® Evergreen \u003c\/h2\u003e \u003ch3\u003eWhat is the difference between CryoSure® caps and standard HDPE tube caps?\u003c\/h3\u003e \u003cp\u003eStandard Caplugs® Evergreen HDPE caps (300-3010, 300-3532, 300-3541) are rated for -80°C ultra-low temperature storage. CryoSure® caps (300-3900) are engineered specifically for cryogenic vial applications at -196°C liquid nitrogen vapor phase and immersion — the additional 50 °C difference from -80°C to -196°C is significant: standard HDPE thread geometry can fracture under the extreme thermal contraction at LN₂ temperatures, allowing cryoprotectant vapor loss over long-term archive. CryoSure® caps are specifically engineered to maintain thread engagement and sealing integrity at LN₂ temperatures.\u003c\/p\u003e \u003ch3\u003eWhat is the difference between the 200\/Bag and 1000\/Bag CryoSure® cap formats?\u003c\/h3\u003e \u003cp\u003e200\/Bag packs (e.g., 300-3900-020, -B20, -E20) are the trial-size format — $17.71\/bag ($0.0886\/cap) — suited for evaluating color routing before bulk ordering, or for low-volume programs requiring a small stock of multiple colors. 1000\/Bag bulk packs (e.g., 300-3900-DG2K, -G2K, -R2K, -Y2K) are available for selected colors at approximately $0.082\/cap — a ~7% per-cap savings over 200-count bags for high-volume programs.\u003c\/p\u003e \u003ch3\u003eAre CryoSure® caps compatible with DMSO cryoprotectant at freezing concentrations?\u003c\/h3\u003e \u003cp\u003eYes. HDPE CryoSure® caps are compatible with DMSO at standard cryoprotection concentrations (typically 5–10% DMSO in freezing media). HDPE maintains chemical resistance to DMSO across the full temperature range from room temperature cell suspension preparation through controlled-rate freezing to LN₂ storage and thaw. For unusual DMSO concentrations above 10%, validate compatibility before committing to bulk cap supply.\u003c\/p\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"CryoSure\\u00ae Cryogenic Vial Caps, Non-Sterile, High-Density Polyethylene (HDPE), Blue \\u2014 300-3900-B20 | 200\/Bag | Caplugs\\u00ae Evergreen\",\n  \"description\": \"Caplugs\\u00ae Evergreen 300-3900-B20. CryoSure\\u00ae HDPE cryo vial caps, blue, 200\/Bag. LN\\u2082 vapor + -80\\u00b0C compatible. BPA-free. USA.\",\n  \"sku\": \"3003900B20E1\",\n  \"mpn\": \"300-3900-B20\",\n  \"material\": \"High-Density Polyethylene (HDPE)\",\n  \"color\": \"Blue\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Caplugs\\u00ae Evergreen\"\n  },\n  \"manufacturer\": {\n    \"@type\": \"Organization\",\n    \"name\": \"Caplugs\\u00ae Evergreen\",\n    \"address\": {\n      \"@type\": \"PostalAddress\",\n      \"addressCountry\": \"US\",\n      \"addressRegion\": \"CA\"\n    }\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"price\": \"17.71\",\n    \"priceCurrency\": \"USD\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n    \"seller\": {\n      \"@type\": \"Organization\",\n      \"name\": \"LabSupplies\"\n    }\n  },\n  \"additionalProperty\": [\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Tube Compatibility\",\n      \"value\": \"CryoSure\\u00ae cryogenic vials\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Pack Size\",\n      \"value\": \"200 \/ Bag\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Sterility\",\n      \"value\": \"Non-Sterile\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"Country of Origin\",\n      \"value\": \"United States\"\n    },\n    {\n      \"@type\": \"PropertyValue\",\n      \"name\": \"BPA Free\",\n      \"value\": \"Yes\"\n    }\n  ]\n}\n\u003c\/script\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between CryoSure\\u00ae caps and standard HDPE tube caps?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard Caplugs\\u00ae Evergreen HDPE caps (300-3010, 300-3532, 300-3541) are rated for -80\\u00b0C ultra-low temperature storage. CryoSure\\u00ae caps (300-3900) are engineered specifically for cryogenic vial applications at -196\\u00b0C liquid nitrogen vapor phase and immersion \\u2014 the additional 50 \\u00b0C difference from -80\\u00b0C to -196\\u00b0C is significant: standard HDPE thread geometry can fracture under the extreme thermal contraction at LN\\u2082 temperatures, allowing cryoprotectant vapor loss over long-term archive. CryoSure\\u00ae caps are specifically engineered to maintain thread engagement and sealing integrity at LN\\u2082 temperatures.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the 200\/Bag and 1000\/Bag CryoSure\\u00ae cap formats?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"200\/Bag packs (e.g., 300-3900-020, -B20, -E20) are the trial-size format \\u2014 $17.71\/bag ($0.0886\/cap) \\u2014 suited for evaluating color routing before bulk ordering, or for low-volume programs requiring a small stock of multiple colors. 1000\/Bag bulk packs (e.g., 300-3900-DG2K, -G2K, -R2K, -Y2K) are available for selected colors at approximately $0.082\/cap \\u2014 a ~7% per-cap savings over 200-count bags for high-volume programs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are CryoSure\\u00ae caps compatible with DMSO cryoprotectant at freezing concentrations?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. HDPE CryoSure\\u00ae caps are compatible with DMSO at standard cryoprotection concentrations (typically 5\\u201310% DMSO in freezing media). HDPE maintains chemical resistance to DMSO across the full temperature range from room temperature cell suspension preparation through controlled-rate freezing to LN\\u2082 storage and thaw. For unusual DMSO concentrations above 10%, validate compatibility before committing to bulk cap supply.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48567936549096,"sku":"300-3900-B20","price":17.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/300-3900-B20_01.jpg?v=1779074790","url":"https:\/\/labsupplies.com\/products\/caplugs-300-3900-b20-cryosure-cryogenic-vial-caps-hdpe-blue","provider":"LabSupplies.com","version":"1.0","type":"link"}