It is pretty simple to use a coupon or coupon code or a promotional code. Choose the Costume Discounters store you want to shop online from MyDealsWallet. Click on the best Costume Discounters coupon code, then copy the particular code then you will be automatically redirected to the merchant site. Choose the best product that you wish to purchase. Add the particular product to cart and paste the coupon code at checkout page and get the discount on all the purchases.