Can anyone recommend a good cool box?

[llama42]

Going to drag the kids on a few picnics this summer and I am after a nice cool box to store food and drinks. Can anyone recommend a good one, ideally under £50 but big enough to house food for 4!

Blue Thermos 30 litre one was brilliant for our holiday. Comes with 2 ice blocks. Kept everything cold all day at the beach. Also used it to transport portioned out frozen baby food and it was still frozen 3 hours later when we arrived at our destination

Thermos 165781 Cool Box, Blue, 28 L www.amazon.co.uk/dp/B0001MQ8E4/ref=cm_sw_r_cp_api_glt_fabc_C6B74Y5WAC9EVGZFGV0J?psc=1&_encoding=UTF8&tag=mumsnetforu03-21
This is it. Bargain