i know this sounds silly but i just wandered if anyone has any idea what size teat i should be using for my 10 month old son. i use avent bottles and just switched to size 3 which are appropriate for his age. but the flow is too quick for him to cope with. is there any reason why you have to change them or is it ok to use size 2 till hes on beakers. i would appreciate any advice any wise mother would have to give. because am a bit puzzled. thankyou