Ellis Backpack 20L Buttercup Lid is also compatible with

Lid is also compatible with Simple Modern Classic tumblers

Double Wall Insulation: Keeps beverages cold for hours

Not for children under 3 years old

Durable: Made without lead

Twist off the top lid to pour your drink

Ellis Backpack 20L Buttercup Lid is also compatible withKids Backpack: The 20L Ellis Backpack is designed for ages 6 to 8. School Ready: Features a padded laptop sleeve, a luggage strap, small zip closure pockets, easily adjustable straps, and two expandable bottle sleeves on the sides. Fits: This backpack can fit items such as a laptop or tablet, 2" 3 ring binder, spiral notebook, folders, books, and a sweatshirt. The Simple Modern Hadley lunch bag can fit inside, depending on the other contents within