5col Survival Supply Cache Tubes are clear plastic soda bottle preforms (sometimes called baby soda bottles) with caps. These are extremely rugged containers ideal for carrying small items that need to stay dry and uncrushed. They're also popular in the geocache community as a cheap, durable way to cache log sheets. This would be a great way to carry a fire kit, a USB key with your important documents, money, an emergency fishing or snare kit, bait, etc.
Features: -Dimensions: 5-1/8" x 1-1/4" at widest point -Capacity: 1.5 fl oz (3 tbsp; 45mL) -Empty Weight: 1.4 oz -Material: PET -Weatherproof -Airtight -Will withstand submersion, overpressure, underpressure (up to a point) -Includes anti-tamper ring that lets you know whether the tube has been opened since you sealed it.