Three-piece backpack for kids Material: The school bag and lunch bag are made of polyester fabric, the lunch bag is made of soft aluminum film, the thermal insulation 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 load-bearing textbooks, large capacity space, can store children's back-to-school items, water bottles and umbrellas can be stored on both sides of the schoolbag. The inside of the rice bag has a layer of insulation, can be insulated and cold, can be used all year round, easy to scrub the inner layer stains, with a front bag, can hold small forks, knives and spoons. The strap is removable and can be carried in a hand, across or on one shoulder. Medium capacity insulated water bottle can withstand the playground bump, with a handle ring, easy to carry. Book bag, Application Scenario: This three-piece backpack for kids is suitable for various scenarios, with an adjustable backpack and a 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, perfect for camping, picnic, sports and beach outing Gift: The children's backpack set size can be customized name or pattern, create an exclusive school gift box is the perfect gift for kids 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 pictures, due to the difference in light and screen, the product color difference is normal.