I have the MAM small bottles and big bottles and they are all leaking when shaking them tried them with cold water to make the milk then heating up, using boiling water and cold mixed, and using the tommee tippee prep machcine.
Every time I shake up the bottle it leaks from the holes at the bottom. I have made sure the silicone bottom is pushed in correctly and the bottle is all screwed together tightly but no difference.
Just finally got LO used to a bottle after buying 6 different brands and she is drinking really good so don't want to have to stop using them. HELP!!! 
