My pick for sippy cups

If you have kids, you are going to want to get this water bottle from REI. It is called the Nalgene Everyday Grip-N-Gulp Water Bottle. It is amazing. Seriously. I bought them as stocking stuffers for my two kids because I wanted something a little more grown-up than our other standby cup, the Playtex Insulator. I am in love with this water bottle because it seriously DOES NOT leak, I can wash it on hi-temp cycle in my dishwasher and it doesn't melt (on the top rack, of course), and it looks great. I hate kid stuff that looks like, well, kid stuff. They are spendy, around $8.25 each, but SO worth it! Oh, and did I mention they come in great colors?