I just realized while cooking that a measuring-cup cup (as measured out as 250mL in a glass measuring cup) is the same amount(s) as one of the actual plastic baking measuring cups that go inside each other like Russian dolls lol
I thought they were different somehow (something something imperial metric yadda yadda yaddda)
Your turn to come clean Lemmings!
**EDIT: to clarify, I mean volumetrically for measuring liquids
US cups are weird. I was having trouble with cups I bought where I live overseas which are 250ml and slightly bigger. No difference in some recipes, definite one Lin others. If you are ONLY using those cups, it should be fine as all things are still proportional. But, if using other measures, things can get off.
Additional fun: a Canadian cup used to differ from both US and UK but eventually came to match the UK size