Twdrer 50PCS 5ml Plastic Graduated Vial Tube with Screw Caps,Small Test Sample Bottles Tubes Container with Lid

They are very useful for transporting samples. I used them to take samples for my dog.

I’m sure you can use these for many things, but I have used them for fountain pen inks when I share them with others who want to try a small quantity of an ink without buying a whole bottle. They are just the right size and cap tightly, and definitely seem to be quite durable.

I throw a few of these in my pocket for sample collection on the fly. Perfect size for my needs.

They are the size advertised. Just too small for my use.

These work great for holding ink, so far no leaks whatsoever.

I use these to add inlay material to rings I make. These work great and I can store any extras.

These don’t leak. I’ve collected water samples and carried them in bags and jacket pockets and nothing gets wet.

These containers are perfect for storing my very most precious rhododendron seeds in the refrigerator. The caps are great, too, as they are secure and protect the items inside. One problem with glass or plastic small containers with seeds, however, is that static will retard the seeds from easily being poured from the container unless it is counteracted with a radioactive wiper made for the purpose or a discharger.