Stay Fit that looked pretty cool, and for $2.99 I couldn't not buy it! It has a gel insert built right into the lid that you can freeze to keep the contents cold from the inside - what a great idea!
The lid has side snaps so you know it will stay closed until it needs to be opened. We didn't need it today, but there is also a flap on the top of the lid that holds included plastic ware - very cool! It also fit nicely in Grayson's lunch box.
I give this product a thumbs up!