IKEAKALAS Tumbler, Assorted Colors (2 SETS OF 6) (12)

We have some that were 20 years old still like new. Kids love them and it’s easier to keep portions small

Perfect for our needs. Dishwasher safe, lightweight, won’t break on bathroom floor, multicolored to distinguish who own each cup.

We use this with silicone sippy tops for our toddlers. They've held up great. Granted they're cheaper at an Ikea store but without one nearby (and them not being available for shipping from Ikea) this is the best price ($2 ea) I've found.