It's a little tiny day-to-day thing that drives me completely bonkers.
Baby Wolverine's bottles.
URGH! Is it so hard to pull the teats all the way through the collars, Husband? He washes, sterilises and reassembles the bottles, but he only pulls the teats through to the first 'pop', meaning they're not in right. Which I don't notice until I've filled them up, screwed the lid on and started to shake them - when formula comes out of the gap between teat and collar and sprays all over me, the kitchen and (usually) one of the cats.
I'm almost certain he does it on purpose so that he can get out of the bottle-washing but if he thinks that's going to work he's got another thing coming. I may well change the brand of bottle we use just so that he's got no excuses as to why he can't reassemble them correctly.