I love these bottles! I had reservations paying this much for a baby bottle, but now I'm back for more! They self vent (when not tightened too much) and withstand a lot of abuse! We have tile floors and concrete countertops, and I haven't broken one yet! We get a lot of compliments on them, as no one else has them in my area. This is a standard baby shower gift for me now! And the colors are amazing! I will now have one of each color in the 9oz size, and I'm getting myself a 16oz! (Posted on 12/31/10)