It's a high-quality portable keychain medication bottle to hold your important pills or small items so that you can take them with you anywhere with no worry about any omissions. You should fill the inner space of the metal pill dispenser with cotton to hold the pills still.So that they don't crash each other into pieces. You can remove the middle compartment of the 2 compartment waterproof pill box keychain if it is too big for you. Specifications: Pill box Material:Stainless Steel Pill box Length: 69mm Pill box Weight: 47g Compartment Length: 31mm Compartment Inner dimension:16.9mm*25.4mm and 16.9mm*30.5mm Package includes: 1 x Pill box 1 x keychain 1 x 20mm-keyring 4 x spare waterproof O-rings If you have any questions, please feel free to contact us.If you are not satisfied with our products, we will provide a full refund.