The Skipper Seersucker Snack Square is a nice addition to the matching backpack or duffel bag.  It is a smaller version of the lunch boxes by Mint.  It has blue and white striped seersucker fabric accented with navy banding.  We have used it to keep baby's bottles cold, tote snacks to the zoo, and even as an Easter basket which was then used year round to keep snacks cold.  

Measures 6" x 5.5" x 5.25"