hi angel, the teat which you are referring to is the "variable flow" one. i also bought that coz robinsons having 20% storewide discount. heehee but don't intend to introduce to my boy till much later coz my fren mention her girl keeps getting choke by it.
i also tried looking for the 3hole teat at various places, all out of stock. in the end, i just went straight to robinsons, they have lots there.
jme, can't help you on the poking hole for avent teats coz my hubby spoilt all our 1 hole teat ones. so we gave up , and buy new ones instead of trying to poke.