Centrifuge Tubes, 50mL lab tubes, test tubes with caps, Plastic Container for plant tissue culture kit，coffee tubes，round bottom pack 10 pcs.

These are just perfect for my use.I needed something to use for mixing a herbal supplement I take now and then. It's a powder that does not suspend well and taste like real strong tea. Pretty bad stuff. So I wanted something to mix it up and make it go down quick. I came up with the idea of using a test tube with a stopper then ran across these. They work perfectly for my needs. The opening is big enough for me to add the powder without a funnel, add a little water, shake it up and drink it down - rinse and repeat.These are made out of a good stiff plastic with caps that go on easily and seem to seal tight - well at least enough where they do not leak when I shake up my brew. Also, easy to clean. Not sure if they are dishwasher safe since I don't use a dishwasher, but I suspect they are.I realize my situation is pretty unique but maybe my description can help anyway.

These worked very well for the purpose I bought them for which was to use them for geocache hides. I liked the size which holds a log and small pencil easily and water tight which keeps those logs dry.

Was not used for liquids. Used for protection of small medical supplies from damage while stored in a bag. Worked perfect. Price is right!!!

I used this product to send a liquid sample of juice to a lab for testing, after putting in just a little of liquid I tipped it upside down, shook it all around & it was air tight. I haven’t heard back from the lab yet so hopefully it made it there safe & unopened

Worked as expected

The cap does not fit the bottle, The thread pitch of the cap is different than the thread pitch of the bottle. When screwed on the cap sits at an angle and does not form a tight seal creating a very slight leak.

Excellent for organizing small items in the workshop and home.

Good for carrying around liquids for long periods of time.