I'm happy with these little bowls. Got them for my 15month old to replace plastic plates/bowls that broke after being thrown from the high chair. They suction onto the plastic highchair tray pretty well...the suction doesn't last indefinitely though, so the occasional 'push down' is required. Good for when little ones start using a spoon/fork, stopping the bowl sliding around, and to get young ones out of the habit of lifting full bowls up to investigate. They have been thrown to the floor a few times, but thankfully are robust and not brittle like some plastic, no breakages so far.
As they come with a lid, they are great for storage of anything pre-made, or unfinished snacks, popping in the fridge, or into a bag for outings.
Dishwasher safe...but can't be used in the microwave. Doesn't suction to all surfaces, anything porous, like wood, for example.