As many of us do I collect just about all the points I can, and at my UK casino the same amount of points that gets a £5 ($8) comp on food can be redeemed on a nice steel 4oz hip flask - coincidentally the upper TSA size limit

a couple of those in my rezippable plastic bag and I'll buy my toothpaste at the other end thank you!

http://www.grosvenorcasinos.com/playpoints/#spend

Also veering even further off topic I was on a FR flight STN-LPA. The FA was happy to sell us a duty free litre of vodka for £12 ($20) (the price of three shots) on the condition we bought all mixers from her. I can't remember too much of the flight!