4. Get a hard cooler box and fill it with ice
While they can be a bit of a pain to pack we find that the hard cooler boxes work much better then the soft material kind when it comes to keeping things cool, especially if you pack them full with ice.
Either make the ice in your freezer at home in batches if you have the space or pick up a few bags from the supermarket. For example Tesco sell bags of ice for around X per bag.
What we found on a recent trip to Watercress Lodges during record breaking bank holiday temperatures was that it took quite a while for all the ice to melt when you pack it in tight and we were able to keep our butter and drinks cold for the duration of our two night trip.
This meant that after a day of walking, playing and enjoying the sunshine we were able to enjoy a cold beer or two in the evening with our dinner.
You can make ice at home or you can pick up a 2kg bag from Tesco or Sainsbury's.