Someone gave me a bunch of these divided plastic serving plates with covers, they were just the right size to put a kid size meal in and stick it in the fridge for lunches and meal ready ahead of time. I didn't think I would use it that much, but it was in use for many years.
This one is silly, but after my son was a toddler, I used the pizza cutter all the time for cutting up food.
When I found out I was pregnant, I started buying diapers, I resisted buying all those things we want to get like all the fun clothes. Don't worry your friends will spring for clothes, everyone likes buying baby clothes. By the time my son was born, I had over 1000 diapers, didn't buy more until he was about 5 months old.