Spongebob Squarepants Backpack and Lunch Box Set - 11" Spongebob Backpack with Spongebob Lunch Bag, Spongebob Water Bottle, and More | Spongebob School Supplies Bundle. This Spongebob bundle includes a 11" mini backpack with adjustable shoulder straps, zip closure main compartment and an insulated lunch box, each featuring colorful artwork of Spongebob Squarepants. Show off your love of Spongebob in style! This backpack and lunch box set is sure to be a hit with all Spongebob fans and pairs perfectly with all other Spongebob merchandise. This Spongebob backpack for boys 4-6 has room to carry everything a kid would need when attending school and extracurricular activities! Spongebob insulated lunch box is ideal to keep your food safe all day. Officially licensed Spongebob backpack set for kids, boys and girls alike, also includes a Spongebob water bottle, Spongebob stickers, and a Beach Kids door hanger.