This very packable bag from YNOT is SUPER minimal, very simple, and a favorite choice of mine for packing away into a larger travel bag for daily use.
I get into this bag at 1:30 in this video:
Be sure to check out the list of my favorite packable daypacks.
Other Bags to Check Out:
The Travel Sling from Aer is a stylish, well made daily sling that fits up to a 13" laptop.
The Dashpack Mark II from Arktype has lots of small organization and some very modern styling in a tight, sleek 15L daily carry.
Qwstion is a product design studio in Zurich Switzerland who makes very stylish bags for the "hipper" areas of town without sacrificing functionality.
The Setout Laptop Backpack from Tortuga is an excellent bag for minimal travel AND daily carry.
The Aer Duffel Pack is not the tool for every job, but for particular uses it just might be perfect for you.