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

Good quality vials. I use them for needles that I ship to customers.

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

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 use this to divide up my ink. Works great!

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

What I was looking for

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.

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