Saw these yesterday in my local store on offer. Never had seen them before and thought they were a pretty good deal. I usually buy ice coffees from time to time, the standard 230ml version is £1.35 so an extra 140ml for just 15p. Compared to Starbucks ones that are £1.59 for 220ml as well.
I bought three and didn't last the day lol
Offer is on till 5/8/2014.