5col Rugged Geocache Waterproof Storage Tubes - Clear/Plastic, 5-pack Weatherproof, Airtight; Will withstand submersion, overpressure, underpressure (within reason) Cache Tubes' Compact Dimensions of 5-1/8 in. long by 1-1/4 in. diameter allow it to fit easily in pockets, backpacks, purses, first aid kits, survival kits, glove compartments, and more. Impact Resistant, Food-safe PET construction with a capacity of 1.5 fl oz (3 tbsp; 45mL) mean it's ideal for holding spices, water purification tablets, compact fishing kits, fire starting kits, .22 lr ammunition, folded documents, currency, gold dust, medication, and so much more. These cache tubes weigh just 1.4 oz. when empty, so they add very little weight to your every day carry (EDC) items.