A Glaswegian term: Describes a special glass bottle, containing Irn-Bru, or other similar soft drink, available in many cornershops in Scotland. The bottle is returnable and currently attracts a 25p refund when you give the bottle back to the shop. Called a cheque as they are often collected and cashed (like a cheque)by students and cheap bastards alike either to buy more Bru, or with enough bottles, some skag.