Conical Centrifuge Tubes 15mL, [50 Pack] Plastic Test Tube with Screw Caps, 15mL Sterile Test Tubes with Lids, 15 mL Falcon Tubes with Printed Graduation and Write-on Spot

These little plastic test tubes are perfect for pre-measuring coffee. I use them to portion out the right amount for each serving; I then freeze those servings, so you can enjoy premium coffee throughout the year without it going off. Super easy to clean and reuse.

I bought these for long-term storage of mycelium cultures on agar suspended in water. I filled them 1/2 full with water, and they withstood the pressure cooker @15 PSI for 20 minutes just fine. I’d buy them again if I ever need more. I would have preferred orange caps over blue so that sharpie writing would be more visible, but it’s not a flaw of the product.

Use them to hold charge for my 50 cal muzzleloader. Works great

Perfect containers.Fast shipping.No issues!

wrong size shiped, but works well.

Very much good

Works as expected for general lab use. Seals well, can be used to store frozen reagents. Good value.

These are good, inexpensive 2 mL microfuge tubes. They close tightly enough but not as tightly as other tubes I've used, so the seal/lock might not be as durable as on other tubes. Based on the given temperature resistance (up to 121C) they might not withstand autoclaving very well, so I be wary about using them at a higher temperature and I don't know if I'd use these for microbial work as they're not advertised as sterile. But they'd probably be fine for small-volume non-sterile buffer storage. Thanks!