- Ackers Conical Centrifuge Tubes 15mL, 100 Pcs Sterile Plastic Test Tubes with Screw Caps, Polypropylene Container with Graduated and Write-on Spot, Non-Pyrogenic, DN/RNase Free

These are really nice tubes that should meet my usage goals quite well. I purchased them to keep single doses of coffee beans as well as cooking oils, etc. on camping trips. They are solid and seal very well.

Spectacular product! Excellent materials. Reusable in our chem lab.

Edited. In hindsight, I'm just sick of cleaning my tube holder. I'm not even sure a flat base tube of this size would fit in my centrifuge. Please disregard the below comment. (Edited:The only thing I would like more is if these had a flat base so I could sit them down upright, outside of the centrifuge.)

This is the perfect product for my DNA lab.

Has a flat base for standing. Great for kids activities too.

We rely on these tubes for multiple reasons; a super tight leak proof lid and the measurements go all the way down past 1/2ml which is super hand for the small amounts of liquids we need to collect and analyze. Plastic is heavy duty; haven’t had an issue with cracking like some other brands. Lid is super tight; great for liquids.

My main needs are for lab work and test tubes to be able to go through the autoclave. They hold up to high pressure for extended periods of time - I did a 2 hour test - and they are perfect, lids and all. I will be purchasing several more for my lab

These worked perfectly for training my service do to alert. I poked holes in the lids and used for scent training. Dog was able to learn to retrieve and alert.