It is very easy to fill and remove coins from the US Coin Holder. This small convenient product is attached to a keychain for further ease of use. The US Coin Holder. Check out our coin holder keychain selection for the very best in unique or custom, handmade pieces from our keychains shops. forumtravelling.us offers coin holder keychain products. A wide variety of coin holder keychain options are available to you, such as material.