Made of specially treated. Keep your medication organized. It is waterproof with sealed loop to keep the pills in good condition. It has a key ring that you can keep in your backpack. Prepare your medicine in advance for yourself or the elderly. pill case for carrying Free combination, adjustable design with 7 compartments. You can attach your keyring and unscrew compartments that you do not need. for travel and outdoor sports. Outdoor activities where water resistance is required. It is a perfect gift for family and friends who need it. Total length: 7.2 inches/185 mm. Outer diameter: 0.9 inches/23 mm. Inner diameter: 0.69 inches/17.5 mm. Inner length: 0.83 inches/21 mm. Total weight: 77 g. Colour:silver+black+multicolor Material:aluminum alloy Package Contents: 3 x pill holders Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.