Does anyone use these cups? I've used the nipples but we live in AZ and I felt like they don't get enough water for the summer. I have also used the red cups with the yellow nipple and they worked ok but I found the yellow ding-a-ling thing kept breaking off. I found these on Amazon and was wondering if anyone has tried them and worked ok? They are a little pricey for 5 but they are on sale right now. Thanks!