The Playtex insulator spill proof cups are the best sippy cups that I have tried. They are a good value. They dont cost too much. These are the only sippy cups I have tried that don't spill when tipped over or upside down. My son likes to throw his sippy cups and these cups keep all his juice in its place. I have tried a couple of other ones and they work for when my son is calm but usually I end up with spills everywhere. I would definitely recommend these sippy cups they are awesome for toddlers like my son who like to throw and take their sippy cups everywhere.