noun
plastic shopping bag; carrier bag
Refers to the thin plastic bags provided at store checkouts. Often used in contexts of environmental reduction or charging fees.
レジ袋は有料になりました。
Plastic shopping bags are now charged for.
レジ袋を辞退してエコバッグを使う。
I decline a plastic bag and use my reusable bag.
Compound of レジ (from English 'register', i.e., cash register) and 袋 (bag).