[Yetanfou]

The Rail Ale festival in Wales [1] uses branded half-pints as entry tickets. The festival is spread out (the 'rail' part) over several locations, entry to which is granted on display of that year's half-pint glass. Once finished said half-pint ends up in the cupboard, to be pulled out when sharing a beer with friends. An avid visitor might end up with quite a few of them, true, but theses glasses being both useful as well as decorative this is not much of a problem.

[1] http://rail-ale.com/