If I want to use say food wallet on an ecommerce website

Food Wallet
If I want to use say food wallet on an ecommerce website, which accepts Paytm online,  where do I go to check if I can us food wallet before making the purchase?

Paytm food wallet will work on all online/offline merchants. If a merchant is of food category, the food wallet balance will be displayed in cashier page and the balance will be automatically used if you pay using Paytm wallet.