We bought the type that keeps things cold--forgot where the heck we plug into--
It does the job for us---keeps everything cold--we pack it with sodas yogurts- and cold cuts plus bread---some bananas--
This way we just reach back and grab what we want to drink and for me its perfect--cus I make a sandwich--have a yogurt etc-
We do stop -naturally to stretch the body--
Our friend,who has an RV, suggested it to us and we luve it--
Naturally sizes vary--so ours fits on the floor behind the driver and it saves time rather than stopping for a snack--
Let me know if U find what U like--
Sorrry I didnt answer sooner but just checking back on topics--

Barbara

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