eBay has the Camping Survivals 20L Small Backpack (Several Colors) for $11 with free shipping. Features front zip pocket, adjustable shoulder straps.
Amazon has the Lifewit 15L Large Insulated Leakproof Thermal Lunch Bag for $14 with free shipping on $25+ or with Prime. List price: $20. Made of insulated material which can keep foods and drinks cool or warm for more than 5 hours , interior lining is made of food grade PEVA foil.
Has excellent Amazon Reviews.
Amazon has the Samsonite 117356-1398 Tectonic Lifestyle Crossfire Business Backpack (Green/Black) for $30 with free shipping. Features checkered cross dyed nylon, dedicated, padded laptop compartment fits most laptops up to 15.6", fleece lined tablet pocket protects smaller electronics.
eBay has the Michael Kors Jet Set East West Crossbody Clutch (Blossom, 35F8STTC9L) for $67 with free shipping. Features saffiano leather, top zip closure, 2 interior slip pockets.
Macys has the Kenneth Cole Reaction 16" Laptop Case for $15 - $3 off with coupon GIFT (Ends 12/24) = $12 with free in-store pickup or $10.95 shipping to home. Features durable fabric with a two-tone finish brings stylish protection to the laptop case, padded compartment fits most laptops up to 15.6".