doggy bag
US /ˈdɑː.ɡi ˌbæɡ/
UK /ˈdɑː.ɡi ˌbæɡ/

1.
a bag provided by a restaurant for a customer to take home leftover food
:
•
After dinner, I asked for a doggy bag to take the rest of my pasta home.
•
It's common practice to ask for a doggy bag in many restaurants now.