Eva had a great Tommee Tippee one, which she could get the water out of fine, and it didn't leak anywhere. She used it from about 6 months... until she lost it a few months ago, and I didn't want to pay so much to replace it.

I bought a set of 2 Little Wishes ones from woolworths, but I am going to take them back, not even I can suction water from them, so god knows how Eva is supposed to!

I actually find the Take n Toss range to be great. Because there are no annoying valves or teats, yet the water flow through the holes isn't too overpowering. But Jazz might still be a bit young for them. (& I don't toss them, they are great to keep reusing!)