Material: Bottle openers like these are commonly made of durable materials such as stainless steel or metal alloys to withstand the rigors of opening bottles.
Function: The main purpose of this bottle opener is to open beverage bottles, such as beer or soda bottles, by prying off the caps.
Portability: Due to its credit card-like design, this bottle opener is usually thin and lightweight, making it easy to carry in your wallet or pocket. It's a convenient tool to have on hand for impromptu bottle-opening needs.