Posted on 16 Feb 2013
Keeping ice for as long as possible kind of depends on how much you are willing to spend. There are a few options from £40 ish to ££1000.
The cheapest solution is a passive ice box which will keep ice for between 5 & 10 days depending which brand you buy.
The best option is a portable freezer, expensive to buy but then very cheap to run and by far the best thing since sliced bread. Will stay at -18 (3 star freezer) in the height of summer, so you can keep ice forever as long as you have a power source.