Daily cleaning in the dishwasher works fine and nothing sticks in the drinking holes afterwards. When they are filled up to the line fit exactly 230ml pure. The material is thin, but fits comfortably in your children's hands and the lid close absolutely tight. The expiry of the cup, as described in other reviews is exaggerated. Since a maximum of a few individual drops come out.
What I really like, that is, they can be combined with the small picnic trays from Nuby and you can also go to use for fruit or biscuits.
All in all: more performance than price clear recommendation !!