As long as the size you’re ordering can fit in your cup, you’ll be fine. But keep in mind, cold drinks are “bigger” than hot drinks to account for ice volume. A grande cold drink would need a venti hot cup to fit in. And while cold drinks can go in hot mugs, I wouldn’t feel comfortable putting a lot of hot drinks in cold mugs.

I have lots of hot cups and I don’t order hot drinks ever, so all I use them for is cold drinks. The sizing might be a little off since iced cups are made larger to accommodate the drink itself and the ice, but I’ve never had a problem making it work and I’ve never had a barista tell me that my drink wouldn’t fit in whatever cup I was using. 🤷🏻‍♀️

Since the pandemic, I haven’t been taking my cup into the cafes to be used, obviously, so usually I just take the cup my drink comes in, pour what I can into my reusable cup, and then drink whatever is left over. It works just fine for me!