These bottles claimed to reduce gas, but I felt it was complete non sense. The bottle has a tiny internal straw and an extra sealant between the nipple and this straw to prevent leaks. But this instead leaked everytime I fed my baby. The bottle itself is very big compared to standard 4 oz bottles. But then you can never use the volume above 4 oz mark as it starts to leak. These are just rubbish and waste of money. And not to forget the cleaning part, it is big hassle to clean the straw with the nano size brush provided. I would never recommended anyone these bottles you are better off buying those cheap standard gerber bottles that costs 4 times less than these.
Last edited on Oct 07, 2009