Caplugs® Evergreen 5.0 mL Threaded False-Bottom Sample Tubes, Polypropylene (PP), Natural, Non-Sterile, 500/Bag
The Caplugs® Evergreen 5.0 mL Threaded False-Bottom Sample Tubes are molded from natural polypropylene (PP) for routine sample collection, aliquoting, and short-term storage on automated analyzers and benchtop workflows. Their threaded neck accepts screw caps for secure transport, while the false-bottom geometry improves probe access and helps minimize dead volume during aspiration.
Technical Specifications
| Product Type | Threaded False-Bottom Sample Tubes |
| Volume/Size | 5.0 mL |
| Material | Polypropylene (PP) |
| Closure/Cap | External thread for screw cap (cap sold separately) |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 500/Bag |
| Country of Origin | USA |
Applications
- Sample collection and aliquoting on automated and benchtop analyzers
- Short-term storage of aqueous biological and reagent samples
- Specimen handling in clinical and reference laboratory workflows
- Low-speed centrifugation of samples within PP-rated limits
- Reagent dispensing and dilution preparation at the bench
- Secondary containment and transport when fitted with a screw cap
Quality & Procurement
Each bag ships from US inventory through labsupplies.com, an authorized Caplugs® Evergreen dealer. These tubes are Made in USA, and bags carry lot numbers to support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available for high-volume procurement — contact our team for a quote.
Frequently Asked Questions
Are these tubes sterile?
No. These tubes are supplied non-sterile. For applications requiring sterility, validate an in-house sterilization method appropriate for polypropylene before use.
What does "false-bottom" mean for these tubes?
The false-bottom geometry positions a tapered internal floor above the molded base, improving probe and pipette access while reducing residual dead volume during sample aspiration.
Do these tubes include caps?
The neck is externally threaded to accept a compatible screw cap, but caps are not included in this pack. Order caps separately to match your closure and transport requirements.
Can these tubes be centrifuged?
They tolerate low-speed centrifugation within the mechanical limits of polypropylene. Confirm your g-force does not exceed the resin's rated capacity for your tube format before spinning.