Large-capacity design, size 1.8 * 6cm, can accommodate small items such as medicine capsules, pills, phone cards, valuable jewelry, small survival and emergency items. Titanium alloy material, precisely processed by CNC technology, light and durable, resistant to strong acid and alkali corrosion, stable heat and cold resistance. Waterproof. The threaded port + O-ring has good airtightness and watertightness, and is waterproof and moisture-proof. Suitable for travel, camping, adventure, survival, fishing, hiking and other outdoor activities. It is an essential tool for outdoor emergency survival. Note: The data are all manually measured, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.