Material: aluminum alloy;Size: approx. 4.8 x 1.7cm / 1.88 x 0.66inch(length x diameter). The lid can be screwed tight, sealed and waterproof, the inside is very clean and can be packed in emergency, commonly used tablets. You can carry this small pill bottle with you wherever you go. It can be easily clipped to a key chain, handbag, belt ring, or used as a zipper for a coat or jacket. Can put the pill or match etc., also can act as the key to hang the ornament the function is complete and very convenient to carry, suitable for hunting, fishing, camping, adventure, wild life saving and other outdoor activities or household. You can also place your personal information (name, contact person in case of emergency, phone number, and previous drug allergy history, hanging on children or the elderly without the ability to help themselves, to facilitate lost contact with relatives).