That is great news about the size 3 avent. We never followed the ages on the teats, as our DS seemed to love the fast flow.
I have found this info on our FAQS board, this should help you out with regards to cluster feeding.
Tanking Up
--------------------------------------------------------------------------------
One way of insuring that your baby eats enough is to increase his intake during the day, before 11 P.M. By “tanking up”, as I call this strategy, you get more food into his tummy, which, in turn, enables him to sleep through longer stretches at night. Tanking up is also great for growth spurts, those two— or three—day periods when your baby eats more than usual (see pages 115—119).
Tanking up consists of two parts: clusterfeeding, which is done at two-hour intervals in the early evening, at 5 and 7 or 6 and 8; and the dreamfeed, which is given somewhere between 10 and 11 (depending on how late you or your partner can stay up). With the dream feed, you liter-ally feed your baby in his sleep. You don’t talk to him, or put the lights on. It’s easier to do with a bottle, because you just wiggle the nipple into his mouth and that will activate the sucking reflex. It’s a little more challenging if you breast-feed. Before you give him your breast, stroke his bottom lip with your pinky or a dummy to get his sucking reflex started. Either way, at the end of the dream feed, your baby will be so relaxed you can put him down without burping.
I recommend tanking up as soon as your baby comes home from the hospital, but you can start using both strategies any time during the first eight weeks and the dream feed until seven or eight months (by which time your baby is drinking between 175 and 250 ml (six and eight ounces) per feed and getting a fair amount of solid food). Some infants are harder to tank up than others. They might take early evening feeds but not take a dream feed. If that describes your baby, and you have to choose one, concentrate on the dream feed only. Don’t bother clustering. For example, you feed your baby at 6, give her a bath and do the bedtime rou¬tine, and top her off at 7—she’ll probably only take a few ml/ounces. Then at 10 or 11 (if you’re normally up that late, or if your partner is) try to give her a dream feed—never later than 11. But don’t give up after one or two nights. It’s unrealistic to think you can change a baby’s habit in less than three days, and for some infants it takes as long as a week. There are no miracles here, but persistence usually pays off.
taken from Secrets of the Baby Whisperer p94
Hope this info helps.
Paula x
