Amazon has the Lifecolor Waterproof Diaper Bag Backpack (Orange Pink) for $30 - $9 off with coupon OX6TU4EB (Ends 1/14) = $21 with free shipping on $25+ or with Prime. Features a large main compartment, three insulated bottle pockets, waterproof diaper pocket, two side pockets.
Has excellent Amazon Reviews.
eBay has the Samsonite Tenacity 3-Piece Spinner Luggage Set (Black) for $100 - $20 off with coupon PRIMO (Ends 7/21) = $80 with free shipping. List price: $270. Includes 21" and 25" upright spinner suitcases and a 15.5" laptop backpack.