I've bought two of these and the quality is great. These are large enough to actually be useful, only thing to improve is the price.

Strong, well-made precise. But the smell! Delrin gasses the odor when the cap is closed, but dissipates quickly upon opening. Just don't keep anything in it that absorbs odor.

Perfect for holding two spare pulsar thermal monocular batteries

When you open them up, they will have a very distinct & pungent funky odor to them, it is not the capsule itself, but more the o-ring that helps seal it. Remove the o-ring & wash them or find the correct size & discard them, the odor they release can come back. According to
CountyComm, the delrin itself is not the cause of the odor, it is not possible for this material to create the smell. The o-ring is a whole other story, so wash them & see if that helps, if not toss them & buy another brand that doesnt cause this issue. Im still dealing with it & now Im just looking on Amazon to see what I can swap-em with. The capsule itself is awesome, the threads are perfect they smoothly spin the cap back on. As much as it may seem that I am knocking this product, Im not, just the o-rings gotta go.

Cheers 🍺🍻🍺,
DC

Well made air tight container for any goodies that need hiding from the eye or nose.