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.

Great product. I use them to store coffee beans in the freezer. Fits about 20g per tube. They have lasted a while, they are dishwasher safe, and they hold up to the freezer. Fair price and very useful.

Prompt delivery. Correct item

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

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.)

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.

This is the perfect product for my DNA lab.