Baby Bottle Cage

From the very first, my granddaughter has been independent. When she was about 2 months old, she started trying to hold her bottle herself, but it was too big for her hands to grip. I made a very simple "cage" so that she could hold it herself by cutting a single joint  out of an OBall from Rhino Toys (http://www.kidsii.com/t-brandsrhinotoys.aspx). These balls come in a couple of sizes, I used the "Regular" size, which is, I think about 4.5" diameter.  We were using Avent 4-ounce bottles, so I don't know whether this will fit other bottles, but I'm guessing that it might since the clearances are pretty flexible, and bottles seem to be more or less the same diameter, at least around the neck, which is where this settles. (A bottle with more capacity will probably be too tall to fit inside the ball, however.)