Embarrassed buying food for sploshing?

Ok this saturday I'm off with a friend to have some fun in a pool of custard but in order for this to happen I've had to buy 100's of packets of 7p custard from tescos and there's no way I could do this in one go because first off they never have enough on the shelf and also I get a little embarrassed at the tills which a paper and loads of custard. Instead I've been buying about 10 a day and still feeling slightly embarrassed as it always seems to be the same girl at the checkouts!!
So anyone else felt embarrassed when buy food for sploshing or is it just me?
Maybe its worse because I know what I'm going to be using it for too?

So anyone else felt embarrassed when buy food for sploshing or is it just me?
Maybe its worse because I know what I'm going to be using it for too?
