Three-piece backpack for kids Material: School bag and lunch bag are made of polyester fabric, lunch bag is made of soft aluminum film, insulated water bottle is made of plastic outside, and the inner liner is made of 304 stainless steel. Sizes: Children's backpack measures 11.02x5.12x17.32 inches (L x W x H), lunch bag measures 9.1x5.1x8.2 inches (L x W x H), insulated water bottle measures 3x3x8.46 inches (L x W x H) Features: 17-inch children's schoolbag reinforced base to carry textbooks, large space capacity, can store children's back-to-school supplies, water bottles and umbrellas can be stored on both sides of the schoolbag. There is a layer of insulation inside the lunch bag, which can be kept warm and cold, can be used all year round, easy to scrub the inner layer stains, with the front bag, can hold small knives, forks and spoons. The strap is detachable and can be carried diagonally and on one shoulder. The medium-capacity insulated water bottle can withstand playground bumps and comes with a handle ring for easy portability. Application Scenario: This three-piece backpack for kids is suitable for a variety of scenarios, with an adjustable backpack and dual-purpose lunch bag for school, travel or outdoor activities. Insulated water bottle non-slip bracelet, suitable for children to grasp, lunch bag 6 hours constant temperature preservation, suitable for camping, picnic, sports, beach outing Gift: Children's backpack sets can be customized with names or patterns, creating a unique school gift box is the perfect gift for children's back-to-school season! A practical choice for holiday gifts for children aged 3-12! It is also the best gift for boys and girls at Christmas, Thanksgiving and Halloween Warm reminder: This size data due to different measurement methods, error within 1-2cm is a normal phenomenon. When taking photos, the product color difference is normal due to the difference in light and screen.