Recommendation for a family back pack

[Autumnisbetterthansummer]

My youngest child is now 4 and I don't need a buggy a lot of the time now. I have three kids, I'm after a good quality rucksack that will hold four drinks bottles either all on the outside or two outside and two inside comfortably. With a small amount of spare clothes / snacks in too. I have a good budget of about £70 if anyone can recommend a good one please.

Try decathlon. They have good inexpensive rucksacks with good side pockets and internal space.

https://www.decathlon.co.uk/p/hiking-backpack-23-l-escape-500-rolltop-green/334561/c328m8971405

Its not waterproof if that matters to you