rach, dunno leh.. I read from website where several ppl complaint that the tommee tippee nipple collapse easily. Tommee Tippee website have this FAQ on nipple collapse also (as follow):
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7. Why is the nipple collapsing when my baby is feeding?
The closer to nature nipples are very sensitive as it is made of specially designed silicone material which can sometimes stick together when not used, this is perfectly natural. To ensure the slit at the tip of the tent like valve can open before use, flush through with water and gently manipulate the valve between finger and thumb until you see the slit re open. This allows the air to flow into the bottle and prevents the teat collapsing.
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I think I would have to go home to open up my Lucky Baby sterilizer and bottle warmer to measure the size before buying the tommee tippee.
BabyG, my friend rave about Dr. Brown's bottles and encourages me to get this brand but I see tommee tippee is more to breast-feeding alike. Is Dr. Brown's bottle also?
Will spree for milk bottle cost more shipping fee in view of the packaging which will take up more carton space, thus bigger volume charged?