OK....so just in case you are looking or thinking to buy these 'safer' GLASS bottles but are concerned with breakage here is some food for thought....

Go ECONOMY - and just buy the Evenflo glass bottles...be sure the get the ones with silicone nipple.  Some stores still sell the ones with the rubber nipple until the supply runs out.  You can get SIX bottles for about $10.  That is CHEAP!