o.k. this one is a little expensive and I have seen different ones too

159.99

Here is one that looks perfect it doesn't even look like you have to plug it in....
Perfect for today's busy or traveling pet owner. Saves expensive boarding fees. Set the timer, and the lid pops open to feed pets on schedule! Two dishes with 48 hour timer and ice pack. Holds 1 lb. canned or 2 cups dry food. 9"W x 7"D x 3"H.
39.99

Hope this helps..... they seem to have some more too on the website...