Medicine organizer made from high-quality aluminum alloy material, lightweight(only 0.5 oz), strong and durable, anti-rust, safety and environmental protection, great for storage Vitamins, fish oil. The spiral inner wall and its o-ring seal ,ensure 100% waterproof, no need to worry about accidental moisture,suitable for storing emergency medicine or small items. Orders of 2000 pieces or greater are eligible for sea shipping. 100% guarantee for quality.