A small version of the Slick Ball, designed to fit in a small pocket or purse are the best answer for storing small amounts of way stealthy. Made of medical grade silicone, which will make the content does not stick
whatever the material that you want to store.
Easy to open, just need to tighten a little and ready.
4 mini ball in each pack 3 grams each.
Easy to clean, with soap and water or alcohol for cleaning without water.