I like these cups. When much kids were younger, I would buy a bunch at one time, and never let them get too old before switching it out. No matter what the advertisement said, they all leaked in some way, shape, or form. Maybe it's me? Lol they are older now so I can buy juice boxes, or water. I found mold in various parts of these cups several times while washing them, and they never ever didn't get washed daily!