Not the bag, your payment.
Why not try plastic? A credit Union debit card works just like cash at any retail outlet with a point-of-sale scanner, make the payment directly from your share draft account. No fumbling for a pen or identification. No worrying about lost or stolen cash. You get a receipt from the store and a copy of your account transaction for easy record keeping.
Stop in to request your debit card. Maybe plastic is the answer.