Trolley Coin

In many countries they use a coin as a deposit when you take a trolley at Supermarket, you need to enter the coin into a special slot that is connected to the trolley and take it back when you return the trolley. And we are the trolley coin manufacturer, make the trolley coins, which can attached on the keychain, or kept in the wallet.  It is easy to carry with. With the trolley coin, you need not to fumble to search the money coin when fetching the trolley for shopping.