Top critical review
Good ... BUT lids leak constantly
Reviewed in the United States on December 12, 2017
These cups SHOULD be 5-star, but the lids are awful. They are advertised as leak-proof. They are NOT leak-proof.
The lids are thin and exceedingly difficult to thread properly onto the cups. I have had so many spills with these and am now SO careful when putting the lids on. And still, even when the lids LOOK secure, sometimes they aren't. I am seriously fed up with these cups after so many spills into my travel cooler. Huge mess and huge waste of milk (at least 30 ounces in 2 months). This is such a fatal flaw that I'm looking for better alternatives.
That said, otherwise this would be a great product. Plusses: affordable, cups nest for storage/travel, lids lock into each other for storage/travel, cups stack securely in fridge/freezer, can pump into them directly using the adapter, size is right ... Avent people, please fix these lids!