Possible Clues:

• Leftovers carrier
• Receptacle for leftover food
• Something you have filled when full
• Remains of course herein for the setter?
• Child's pet name for the chips - of course, it's essential for any takeaway
• Leftovers holder
• It may hold some take-away destined for the lab
• Source of tomorrow's lunch, perhaps
• Leftovers receptacle
• Leftovers container (Var.)