Sugarshots! but they are hard to get hold of. Definitely my #1 choice though.

Ecobubs are good, I recommend them too. Bumgenius have a snap version out. Um, so do happy heiny from what I recall.

I'd be tempted to go for something like an A12 as well, cos the outers dry so quickly and inserts can be chucked in the dryer if need be.