Caplugs® Evergreen
4 mL Sample Cups, LDPE, Natural, Cobas® Compatible — 300-1006-020 | 1000/Bag | Caplugs® Evergreen
4 mL Sample Cups, LDPE, Natural, Cobas® Compatible — 300-1006-020 | 1000/Bag | Caplugs® Evergreen
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Flat Top Sample Cup Caps, LDPE, Natural — 300-1006-020 | 1000/Bag
| Quick Reference — 300-1006-020 | |
|---|---|
| Cap Type | Flat Top |
| Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Cup Compat. | Fits Caplugs® Evergreen 4 mL round-bottom sample cups |
| Probe Access | ✗ Cap removal required before probe aspiration |
| Sealing | ✓ Full sealed closure |
| Sterility | Non-Sterile |
| Pack Size | 1000 / Bag |
| Price | $25.96 / Bag ($0.0260 / cap) |
Technical Narrative
The Caplugs® Evergreen is a natural Low-Density Polyethylene (LDPE) flat top sample cup cap — the standard sealed closure for Caplugs® Evergreen 4 mL sample cups used in urinalysis, clinical chemistry, and serology workflows. The flat top LDPE cap snaps onto the sample cup rim with positive retention, providing a complete sealed closure that prevents evaporation during refrigerated storage, pneumatic tube transport, and pre-analytical staging. Natural LDPE caps are the default for general specimen workflows and are the preferred format for laboratories using a secondary labeling system (barcode, written ID) as the primary specimen identification method rather than visual color routing.
LDPE construction delivers the defining performance property for sample cup caps: flexible snap-on retention that maintains engagement across the full temperature range of clinical laboratory sample handling — room temperature processing, 4°C refrigerated staging, and -20°C frozen cup storage — without the brittleness that causes rigid plastic caps to fracture under repeated snap-on/snap-off cycles in high-volume clinical workflows. LDPE's chemical inertness to urine, serum, plasma, and standard assay diluents ensures no cap material leaching into specimen contents at storage temperatures.
At $25.96 per 1000/Bag — $0.0260 per cap — the delivers flat top sample cup capping at per-cap economics for high-volume clinical programs. Also available: 300-1006-B20 (Blue, $25.96/1000); 300-1006-R20 (Red, $25.96/1000). For probe-pierce-without-removal cap format, see perforated top caps (300-1999-020).
Technical Specifications — Caplugs® Evergreen
| Specification | Value |
|---|---|
| Part Number | |
| Caplugs Item # | 3001006020E1 |
| Cap Type | Flat Top |
| Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Cup Compat. | Caplugs® Evergreen 4 mL round-bottom and flat-bottom sample cups |
| Probe Access | ✗ Remove cap before probe aspiration |
| Sealing | Full sealed closure |
| Sterility | Non-Sterile |
| Pack Size | 1000 / Bag |
| BPA/Phthalate | BPA-free; no phthalate plasticizers |
| Country of Origin | Made in U.S.A. (California) |
Flat Top Cap Application Compatibility —
The flat top LDPE cap fits Caplugs® Evergreen 4 mL sample cups for the following workflows:
| Application | Specimen / Use | Notes |
|---|---|---|
| Sample cup sealing (flat cap) | 4 mL round-bottom sample cups (127-0017 family) | Flat LDPE cap snaps onto sample cup rim for sealed storage/transport |
| Urinalysis cup capping | Random urine sample cups in auto-analyzer workflow | Flat cap seals cup during centrifugation and before analyzer loading |
| Serum / plasma cup storage | Primary tube-derived serum/plasma cups | Flat cap prevents evaporation during refrigerated storage |
| Auto-analyzer sample cups | Discrete analysis auto-analyzers (Cobas, AU series) | Flat cap for capped sample cup staging before analyzer aspiration |
| Color-coded specimen routing | Blue cap = urine; Red cap = serum; Natural = general | Color cap enables visual specimen-type routing in high-volume labs |
| Sample cup transit | Specimen cups in pneumatic tube transport systems | LDPE flat cap withstands pneumatic tube transport forces |
| Archiving capped cups | Capped specimen cups in refrigerated archive | Flat cap reduces evaporation during extended refrigerated storage |
| Point-of-care sample prep | POC specimen collection to analyzer cup transfer | Flat cap seals cup during patient-side collection and transport |
Flat caps provide complete closure. Remove cap before probe aspiration. LDPE flexibility ensures positive snap-on fit without cracking across the full temperature range of sample cup storage.
Chemical Resistance — Low-Density Polyethylene (LDPE)
LDPE provides excellent flexibility, snap-on retention, and broad aqueous specimen compatibility. Not autoclave-compatible.
| Reagent / Condition | Compatibility |
|---|---|
| Urine (all types) | ✓ Excellent |
| Serum / plasma | ✓ Excellent |
| Aqueous buffers | ✓ Excellent |
| Dilute acids (<10%) | ✓ Good |
| Dilute alkalies (pH <12) | ✓ Good |
| Short-chain alcohols (brief) | ✓ Good |
| DMSO (≤10%) | ✓ Good |
| Concentrated organic solvents | ✗ Not recommended |
| Autoclave (121°C) | ✗ Not compatible — LDPE softens |
| UV sterilization | ✓ Compatible |
Laboratory Applications
The serves clinical urinalysis labs capping urine sample cups after collection; clinical chemistry programs staging capped serum/plasma cups for auto-analyzer runs; point-of-care collection programs capping specimen cups during patient transport; reference laboratory programs using color-coded caps for specimen-type visual routing; and any high-volume clinical laboratory program requiring sealed, color-coded sample cup closure.
U.S. Manufacturing, Quality & Institutional Procurement
Every Caplugs® Evergreen lot is precision-molded at our California manufacturing facility and subject to rigorous dimensional inspection and material purity verification. We supply reference laboratories, hospital systems, and federal procurement offices under institutional pricing programs with blanket-order support and same-day shipping on stocked inventory. Request a sample below to validate fit before committing to volume.
Frequently Asked Questions — Caplugs® Evergreen
What sample cup formats are compatible with the cap?
The flat top LDPE cap is designed for Caplugs® Evergreen 4 mL round-bottom sample cups (127-0017 family) and 4 mL flat-bottom sample cups (127-0018). The LDPE snap retention provides positive engagement across the cup rim. Always validate cap-to-cup fit with a sample set before bulk purchase if using cups from other manufacturers — cup rim dimensions vary.
What is the difference between Natural, Blue, and Red flat top caps?
All three flat top LDPE caps are identical in material and performance — the color difference is for specimen-type visual routing only. Natural : general-purpose default, used with secondary barcode or label identification. Blue (300-1006-B20): designates urine specimens in color-coded routing systems — mirrors the blue-top convention for urine in many clinical laboratories. Red (300-1006-R20): designates serum/plasma specimens — mirrors the CLSI H3 red-top serum tube convention. Choose color based on your laboratory's specimen-routing color-coding protocol.
What is the difference between flat top caps and perforated top caps?
Flat top caps (this product) provide complete sealed closure — cap removal is required before probe aspiration in auto-analyzers. Perforated top caps (300-1999-020) have pre-made perforations that allow analyzer probes to pierce directly through the cap without removal. Choose flat top for complete evaporation prevention during storage and transport. Choose perforated for probe-pierce auto-analyzer workflows where eliminating the decapping step improves throughput.
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