glass cheque 

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.

I'm gonnie cash these glass cheques and get some more Bru and a kebab.

glass cheque by Dean Durrant August 19, 2006

Gless Cheque 

Scottish urban phrase used to describe the tangiable value of Barrs glass juice bottles as an object of currency. 'Gless' being a lazy usage of the noun glass.

Its awright I'll get the fags and bru wi' them gless cheques

Gless Cheque by Mercury Mike July 7, 2006