Review on Tommee Tippee Closer To Nature Transition Cup With Handles For Infants - BPA-Free, 4+ Months, Pack Of 2 by Tiffany Pine

I bought these sippy cups because the bottles work so well. For some reason, even though they are the same size, the nipples invert on the sippy cups. I have to break suction so they can re-inflate while feeding. I also HATE the measurements on the side. I get that the cup shape might be helpful for little ones to hold, but it makes it hard to estimate how many ounces are gone since there are only markers for 1, 3, and 5 oz. I do like the colors and I like that the bottles have the same notch for the handles, so we can use them alternating. My husband and I also don't like the lids. You're supposed to match up a star emblem to get the right fit, but it's rough. Trying to line up the anti-colic vent and then the cap is frustrating.