What do you “cheap out” on as a mom?

I completely cheap out on buying bottled water at the movies. I’d rather splurge
on movie tickets for 8 kids and sneak in my own water than spend $5 per water bottle. I can’t help it. I learned this from my maternal grandmother. My cousin and I were the only kids at Red Sox games that had to eat a sack lunch. I’m not sure what was worse: the smell of tuna salad on my hands all day or the looks we got from all the cool, hot-dog-eating kids.