Mash,
i ditto Keri. DS never too to the sucking kind of spouty cups and we moved directly to a straw - the enlightenment for me was wehn DS took to my frapaccino with ease through the straw and we have never looked back. I think those are like 8+ but he still uses them.
also some one on the board ha dtodl me atht apparently speech therpaists etc do not like the spout cups as they say they do not use all the necessary muscles of the mouth and can cause speech delays., Nw this is not a proven fact only what some say.
Also what i prefer about the straw ones is taht you acn go anywhere and you will always find a straw to feed the LO, and even on airplanes travelling etc. so its a really useful skill.
We used the Nuby ones -I think they are Tommy Tipee in the UK flip top, leak proof, great
come in insulated and non insulated versions as well.
and dont lets these people make you spend more money of sippy cups your LO will make you do enough!