Best cups for babies with easy to clean straws

[BabyEatsEverything]

Have tried various open cups and want to try a straw type cup, but one that’s easy to clean everything, no crevices or slide bits to go mouldy etc.
I’ve seen Tum tum but are they what I want?

Tumtums are great. I think anything with a straw is going to be a bit more labour intensive to keep clean but we’ve never had an issue with mould with ours.