Each pill box is made of wheat fiber, BPA-free, with excellent thickness and hardness, not easy to break, and reusable. (To avoid contamination, please do not open more than one cap at a time when using.)The small moisture-proof pill box features a thick silicone sealing ring. The fully sealed gasket helps make the pill box waterproof and moisture-resistant, protecting contents from humidity and temperature changes.This medicine box has double locks and each of the 8 compartments has an independent lid, helping prevent pills from mixing and allowing secure portability in pockets or bags.The portable size (4.33 x 3.54 x 1.2 inches) and rounded corner design make it easy to carry and store in cosmetic bags, backpacks, or holdalls. It can also be used to store small accessories or other small items.The 8 individual compartments can be customized according to your needs, ideal for organizing fish oil, vitamin supplements, pills, capsules, medicines, and tablets.