/fa/ - Fashion

Hey /fa/, I'm in uni and have gotten fed up with my obnoxious high sierra shit backpack. Based on my lurking of /r/malefashionadvice, I should probably get pic-related.

I'd like to request some backpack advice, basically. What should I get if all of the following apply to me:
> I carry around a 750ml water bottle
> I live in Canada
> It rains relatively often where I live
> I'd prefer to spend under $100USD
> I carry around a laptop that is 1.5cm (0.6") thick
> I don't carry (m)any textbooks, as I am a comp-sci student
> I need easily accessible exterior pockets that can hold pencil case and other misc. items
> I'd like something that lasts me for at least the next 3 years, preferably longer
> I hate velcro

Thanks in advance, sorry if this is too specific, I don't even know if such a thing exists.
We can turn this into backpack general if others need backpack help