Super Mario Backpack for Boys 4-6 - Bundle with 16" Mario Backpack Plus Water Bottle, Stickers, More | Mario Backpack Set. This Mario backpack set includes a 16” backpack with adjustable shoulder straps, zip closure compartment, and top loop for hanging featuring colorful artwork of Super Mario. This Mario backpack for kids contains plenty of room to carry school supplies, your water bottle, and any other small items you need to take to school or on the go. Show off your love of Mario in style. This Mario backpack bundle also includes a Beach Kids water bottle and Rex-Man stickers, making the perfect gift set for any Mario or videogame fan. Officially licensed Super Mario backpack set is perfect for fans of all ages, boys and girls, alike. Set also includes a bonus Rex-Man door hanger.