At first we used soft tip Nuby and Munchkin sippy cups but they would always leak and DD refused to use hard tip ones.. We recently switched to tome tipee ones like this http://www.google.ca/search?hl=en&site=imghp&tbm=isch&source=hp&biw=1280&bih=614&q=tomee+tipee+sippy+cup&oq=tomee+tipee+sippy+cup&gs_l=img.3...5081.9781.0.10014.21.10.0.220.127.116.11.1046.6j4.10.0....0...1ac.1.19.img.8D1idEy7r1s#facrc=_&imgdii=_&imgrc=qSgGnyDrQGHOPM%3A%3Br6sDEckT1JOwOM%3Bhttp%253A%252F%252Ftrusca.imageg.net%252Fgraphics%252Fproduct_images%252FpTRUCA1-12894877reg.jpg%3Bhttp%253A%252F%252Fwww.toysrus.ca%252Fproduct%252Findex.jsp%253FproductId%253D12968874%3B220%3B220
Chloe went from boob to Avent trainer cups and straw cups. We started both at 9mo, she's almost 2yo now and drinks from a regular cup at home [since 18mo]...then uses the straw cups when we are in the car or out & about.
These are my absolute favorite straw cups! 1] They don't leak/drip nothing 2] The straw actually reaches all the way to the bottom