Having breastfed DS2 for the last 4.5 months we are now moving inexorably towards bottles & I have 4 Avent bottles - 2 large & 2 small. I use the teats size 2 and 3. DS enjoys his bottles tremendously (although spews it all over the place but I presume this is normal!). My problem is everytime I have gone out taking a bottle with me it has leaked everywhere. I am closing them very tightly, making sure the teat is properly in and putting the cover on so that it seals(?) the hole at the top of the teat. Where is the leakage coming from? It is happening with all the bottles. Has anyone else had this problem or could anyone recommend another bottle? I am also now going to have to get sterilisers etc. I never really bottlefed DS1 so am pretty new to all this. Be really grateful for any advice, mumsnetters!