I have learned that any sippy cup with a rubbery/silicon cover or spout is going to leak. The only cup I've found that doesn't ever leak is the Nuk transition cup.
DD uses the Sassy Grow Up Cups, available at BRU and we LOVE them. It took her a little to figure it out but we have not had any problems/leaking. I like that she can drink from anywhere around the cup too.
Re: Sippy cup
I have learned that any sippy cup with a rubbery/silicon cover or spout is going to leak. The only cup I've found that doesn't ever leak is the Nuk transition cup.
https://www.amazon.com/NUK-Gerber-Graduates-Learning-10-Ounce/dp/B004OZ22NA/ref=sr_1_17?s=baby-products&ie=UTF8&qid=1323008136&sr=1-17
We stopped using sippy cups and our LO sit at the table to drink.. (He is 2years 7 months) We have new carpet and I didn't want it ruined..
The only ones we've never had leak were this style of Munchkin cup.