I too love the Take n Toss ones. Their just so simple to use.
My favourites would definitely have been the Avent ones that go onto the bottles.
As much as Harry loved them, I hate the Tommy Tippee/Nuby ones... they're great until little fingers get in there and poke a hole, or little teeth... and the teats aren't replaceable, so I ended up with about 6 of them before I changed over to the Take n Toss ones.