Was just in my local Asda and in the car care section i noticed they were selling single use hand warmers at 60p each or 2 for £1 so i got 4 lots. In each pack you get 2 hand warmers. Thought 4 for £1 was not bad? No idea how good they are tho and they look smaller than others. They say they last up to 8 hours - no idea how true this is! I have reusable ones from highlander and they only last 30 mins at a good temp if you are lucky.
Here is the website on the packaging & this is them here:
Here is the website on the packaging & this is them here: