Whats a good sippy cup that doesn't have a fast flow? I need to get Drew off the bottle now and give…

Whats a good sippy cup that doesn't have a fast flow? I need to get Drew off the bottle now and give only his sippy cup. The one he's been using is this Nuby one but he constantly has to take breaths after a few sips because it comes out too fast and I dont need him choking on his milk from it. I've tried to put his milk in it and he wont take it. This is the second sippy cup we've tried and their all too fast of a flow.