I'm looking to get a new backpack as my current one's zip is busted. Can I get some recommendations as to which backpack I should get? Ideally it should be able to fit: Laptop (13 inch), some notebooks, pencil case, lunch box and a bottle of water. As to the price range, around $30, but can go a fair bit higher if the quality (hoping to last at least a year) is good.
I have looked at: https://www.kogan.com/au/buy/anti-theft-fortress-backpack-wi…
It seems decent except it is quite slim with the width at just 10cm. Not sure if it is 10 cm fully expanded or the package (empty is 10cm).
I've always liked rectangle shaped surf brand backpacks if you can get a good price.
Well padded straps, padded back, and a sleeve inside the back for slipping a laptop into, has always served my needs adequately.
You don't need anything fancy but always worth leaving an old t-shirt in the bottom for extra padding so your laptop edge doesn't get scraped when putting the bag down on concrete.