Just been in to Tesco and noticed they had 500ml Powerade cherry sports drinks with a 'try me offer' on the front. They are currently selling them as 2 for £1.40, however they will refund £1.23 per bottle sleeve! Therefore the drinks are free PLUS you get a little bit of extra cash in the form of a cheque refund (OK, only 29p to be precise after 2nd class stamps per bottle so it won't make you rich!). Only one per household, but you could always send one to a friend/relatives address for the other bottle sleeve!
Apolgies in advance if I have posted this in the wrong section!