Searching for the holy grail of cool boxes

[mayblossominapril]

I am looking for a small cool box, preferably passive that will keep ice lollies and dairy free ice cream frozen on days out. It needs to stay frozen for 4 hours. I will be pre chilling the cooler and packing it with ice blocks and frozen drinks.
Any recommendations?

I think a Coleman Xtreme would, but I’m not sure how small they go.

You can probably get different sizes but I bought this recently for our holiday. Rather than chuck it out before we left I put most of a tub of ice cream and ice lollies in amongst other frozen things antle ice blocks and it stayed completely frozen for the 5 hour journey back.

www.amazon.co.uk/dp/B07KKCQP9L?ref=ppx_pop_mob_ap_share

Alongside ice blocks**

Yes Coleman Xtreme

I've wrapped ice cream in newspaper and it stayed frozen for 2 hours so what you are suggesting will be fine.

Thanks. I’ve ordered a Coleman marine as they are seen slightly tougher than the extreme

I had an Igloo playmate and a massive Colman, both left behind in our move. Worked great, just use loads of the blue iceblocks.