This may sound real dumb to alot of you but im unsure about what to do,i plan to try and breast feed but someone said to me that incase i cant and incase i want to express i should have some bottles so which ones are best?theres so many?the most popular to me seem the tommee tippee and avent but also like just say i bought an avent steraliser,would any bottle fit it or does it mean i have to buy avent bottles?and what size would i need and how many?and what tops?i never realised how many tops there were!!!!Please help anyone!!!