Lifefactory Sippy Caps for 4-Ounce and 9-Ounce BPA-Free Glass Baby Bottles, 2-Pack, White

Pretty useless, seem to leak everytime we use them.

I mean, remove the silicone insert or nothing comes out! Lol these aren’t spill proof but they don’t leak when used upright or while drinking if that makes sense. If you turn upside down they will trickle water out as well as if they are on their side. These should be used with supervision if your child is like mine. He gorilla slams his bottles and he loves to pour water onto surfaces and even spit/leaks water out of his mouth onto his shirt so much I could die! But yeah it beats metal or plastic bottles. I prefer that it weren’t a plastic Sippy cap, but I can’t find anything better. The bottles hold up under pressure and all wash easy! Good luck!

4 stars only bc I’ve used this product before and like it. I ordered these to replace my super old one that cracked and got lids instead. Nervous to reorder and have the same thing happen.

I don’t love these much. When the rubber gasket is in neither of my kids can get any milk out; and when I take them out they leak ALL over the universe.

Love that these go onto the 4 oz and 9oz bottles we have, but they seem to crack easily as we dropped the bottle from not very far up and the plastic cracked. I purchased more, hope they don’t continue to crack :/