Caplugs® Evergreen 5.0 mL Unthreaded False-Bottom Sample Tubes, Polystyrene (PS), Natural, Non-Sterile, 500/Bag
The Caplugs® Evergreen 5.0 mL False-Bottom Sample Tubes are molded from clear natural polystyrene (PS) for reliable sample handling on automated and manual platforms. Their unthreaded false-bottom geometry concentrates low-volume samples toward the probe path, supporting clinical chemistry aliquoting, reagent dispensing, and routine specimen transfer in busy bench workflows.
Technical Specifications
| Product Type | Unthreaded False-Bottom Sample Tubes |
| Volume/Size | 5.0 mL |
| Material | Polystyrene (PS) |
| Closure/Cap | Unthreaded, no cap included |
| Color | Natural |
| Sterility | Non-Sterile |
| Pack Size | 500/Bag |
| Country of Origin | USA |
Applications
- Clinical chemistry sample aliquoting and specimen transfer
- Low-volume sample presentation on automated analyzer racks
- Reagent and standard dispensing at the bench
- Routine serum, plasma, and supernatant handling
- Sample storage prior to short-term analysis
- General-purpose liquid handling in QC and research labs
Quality & Procurement
labsupplies.com is an authorized Caplugs® Evergreen dealer shipping from US inventory. These tubes are Made in USA, and each bag carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available for high-volume procurement.
Frequently Asked Questions
Are these sample tubes supplied sterile?
No. These are non-sterile polystyrene tubes intended for general analytical and sample-handling use. For sterile workflows, autoclaving is not recommended because polystyrene is not heat-stable.
What does "false-bottom" mean for a 5.0 mL tube?
The false-bottom design tapers the internal cavity so that low sample volumes pool toward the probe access point, reducing dead volume and improving aspiration on analyzers and during manual pipetting.
Do these tubes include caps?
No. The tubes are unthreaded and ship without caps. They are designed for open-access sampling and probe insertion rather than sealed long-term storage.
How many tubes come in a pack?
Each bag contains 500 tubes (500/Bag). This listing is priced per bag, with tiered pricing available for institutional and grant-funded orders.