OK, like other reviewers have said the suction is not that great; it holds well for a little while but it has to be on an ABSOLUTELY CLEAN AND DRY SURFACE. If there's the slightest bit of moisture, grease, food residue etc. on the surface, or if anything gets spilled around it and gets around where the suction cup meets the surface, it will not hold - so it's not really very effective on high chair and stroller trays. A determined toddler (like mine) can quite easily find the little release tab on the base and you know how they are, once they've figured something out once they keep on doing it over and over and over and over and over....
However having said all that the rubber base does stop them sliding about even if they're not adhering to whatever you're trying to stick them to and they're much more stable than regular plastic bowls. They also have quite high sides compared to normal bowls which makes it that much harder for tinies learning spoon coordination to flick the food over the side. They come with very tight fitting, secure lids which is good for take along or, if you're going through that oh-so-fun fussy eating stage you can just seal the untouched meal and toss it in the fridge until next time. It's also nice to have the versatility of three different sizes for the variety of meals (and leftovers) small children seem to generate. All in all I'm quite pleased with these & glad I bought them even though they turned out to be not so useful in the intended way.
Buy Munchkin Three Stay Put Suction Bowl 3-Pack!
