Two Fit well in the trunk. And fits great behind the front seats if you are not 7' tall.
I have used it to store all kinds of stuff like camera gear, laptop, Zaino detail supplies, beach essentials, Thong Bikini's (Not mine),extra shirt and shorts, .44 Desert Eagle, Ammo, water bottles, Track gear. Pen and biz card storage compartments.
Inexpensive Soft Luggage Idea for a day trip. I even have one I use to store all my original owners paperwork, etc. Top 10 Useful item.