Mmm, I haven't had one for ages! I don't tend to buy plain
crisps (I mean like Walkers, not so much plain flavour) so it's a bit hard to squash a Hula Hoop. If has to be a cheese sandwich though and the crisps have to be either plain or cheese and onion (or salt and vinegar at a push). It's a good way of using cheese and onion crisps as I don't particularly like them....