altamonte mall justice unicorn lunch box with mini backpack flying Rainbow for Kids Back to School Lunch Bags for Boys Girls Women Men Insulated Cooler Lunch Bag Freezable Meal Lightweight Shoulder Strap for School Work Travle 9 W x 12 H x 4 D 22.8cm W x 30.4cm H x 10cm D This is an officially licensed Universal product. Kasqo Dual Compartment Lunch Bag

Best Lightness 3

Unfortunately, they don't come with a backing so you have to create one yourself

Shell Material: Custom-made UHMWPE ripstop Capacity: 15L Weight: 0.8lbs Hyperlite Daybreak ultralight Daypack Pros Large despite light weight Very lightweight thanks to sturdy Dyneema construction Comfortable shoulder straps Easy to adjust all around Water-resistant zippers Cons Not a versatile look Best Lightweight Pack: Hyperlite has built its reputation on producing state-of-the-art tents, garments, and other gear using advanced materials such as Dyneema

Add 4 days food = another 8 pounds, and I'm into the heavy weight area