masona said:You'll see I not beaten yet,is it safe to have a tumble inside the car ?
Perfectly, until the day when you forget to take it out before you leave and drive off to work with all your wife's undies on board....
On a serious note - I bought a device in Halfords to power a 12V fridge, wasn't too dear. 12V fridge is now in the loft, awaiting warmer weather, and the power supply is inside it so I don't know whether it can handle 200W or not, but it might be worth a look. You in Halfords I mean, not me in my loft
Plan C, provided it's dark and the neighbours can't see, is to use the supply of warm liquid that you will have with you when you get up....