BornFree Glass Baby Bottle Review

BornFree bottles came highly recommended by friends who research every single item they buy. I was happy to find a BPA free bottle for my baby and it worked great the first couple of months.
But as he got older, the nipples which I think are overly flexible come loose easily and when my teething infant bites, he has been bathed with milk as the nipple comes out of the bottle. Needless to say, I am using it only for water and that too when I am out of other bottles.