Which brand/type did you introduce first? I think we're going to try a cup soon since the bottle is an epic failure with Riley. I can't remember what we used first with G.
We used the PLaytex straw ones that you can squeeze to "show" them how it works. C still doesn't understand how to do a traditional sippy that great (probably because they are never offered), but she is a whiz with a straw.
First we tried a Tommee Tippee one but she never really liked that one. The one that she mastered first was this one, funny since now she always tilts the straw ones back.
We used a tilty cup. I bought it off amazon. It isn't spill proof but DD could never figure out how to get liquid out of the sippys. (have you ever tried??? U really gotta suck hard!) We used that until she started using the Nuby straw cups.
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We used the Nuby sippy cups with the soft spout for Stella first. We eventually switched her to straw cups and have used a few different brands (Nuby, Tommee Tippee, Playtex)
Re: 1st sippy cup?