Work/school bag recommendation, which do you use?

[ingriface]

Hello everyone! I want to upgrade my ever growing collection with a new bag. I've been eyeing the large Chloé Baylee, but that size is hard to find.
Does anyone have any bags to recommend? It should fit a 13" laptop, a few books, a bottle and so on. And it needs a long shoulder strap/crossbody strap.
And which one do you use?

Have also been considering this Gucci: http://www.gucci.com/no/styles/353437KGDHZ8963#

 

[mary79]

I have tried a large PS1 and liked it, although the long shoulder strap did get stretched out of shape with so much weight in it...