M&S also do a range of 1.5l pouches, not the cheapest at around £14, but good quality, their Sauv Blanc is a NZ from Marlborough and is pretty decent. 1.5l is also a useful size if you are freezing them.
Hi there Bike_Like_A_Mum,
I realise I am replying to an old-ish comment but did you manage to sell your tickets please? I'd be interested in taking them off of your hands.