Sleek work/uni bag for laptop + tablet

Hey guys

I’m looking for a sleek bag that can hold both a 16“ MacBook and a 10“ iPad.

Also a book, some snacks, charger, cable, powerbank, 1 bottle and 1 coffee thermos (doesn’t have to be outside). Should have some level of Organisation for that stuff but mustn’t go overboard.

Also has to be at least water resistant so I can go places 1 hour in the rain without getting wet inside.

Prefer black navy sage but any sleek color appropriate for office settings is okay.

Somewhere between 20-30 l, I like Patagonia osprey etc but haven’t found something that fits all the criteria, can be any brand available in eu. I’ve been eyeing some aer bags but they are like 400 bucks after shipping and customs.

Happy to hear your suggestions! Thank you for the help