I have a three way powered type. Its heavier than the peltier effect types , but more efficient.
It sits quietly in the awning or kitchen tent running on gas.
A also use it home, to keep excess milk, fruit juices and beers cool and ready at a moments notice running on mains.
And when we do large family picnics or travelling to site, it sits in the back of the MPV, running on 12V dc.
We find it really useful