She got it in college and always packed it with her on vacations or to the grocery store and it always came in handy.
I have tons of tote bags, and some of those are the stuffable kind that fit into their own pocket, but I don't have a stuffable backpack.
They are great for day trips when you're on vacation, and I'm considering a few models:
$24 Baggu daypack
Made of ripstop nylon, 16" high / 9" wide / 4" deep. Adjustable straps. Inner drawstring closure, with outer snap and buckle.
Machine washable which is so great--bags can get totally gross.
It comes in solids and elephants and a really cute white and blue stripe but I think this is the most versatile and I can make E carry it without the excuse that it is a girly bag.
$39 Gossamer Gear BigBag
A Big stuffsack/daypack/ with a reinforced hanging/haul loop. 14 x 23 in
silicone-coated ripstop nylon
I wish this came in other colors because it looks like a big trash bag.
Compressible design that allows the pack to be stuffed into an interior pocket / Large main compartment with zippered top closure / Side water bottle pockets / Contoured Airmesh shoulder straps
Fabric: 70D PU-coated nylon ripstop Volume: 1040 in3 (17 liters) Weight: 9 oz (245 g)This one is more of a real backpack and has more pockets and features than the other, but it is 3x heavier.
$34.50 REI flash pack
This one has tons of features and is made of ripstop nylon, 18 x 9.5 x 8 inches.
- Turn inside out and it's a stuff sack to help organize your gear; once at basecamp, reverse it and use as a daypack for short hikes away from camp
- Removable back panel pad doubles as a sit pad; removable hipbelt and sternum strap make the pack cutomizable for different uses
- Interior zippered pocket secures keys and other small items