Ebay offers Hydro Flask Kids' Insulated Hard Sided Lunch Box for $16 (Reg $40) with free shipping.

Product Description:
The Hydro Flask Kids Insulated lunch box is ready for anything kids are up to. The insulated interior keeps PB&Js and carrot sticks fresh. It’s the perfect lunch box for school and picnics, pairs great with Hydro Flask bottles, wipes clean and is playground-durable. The large hinge top makes it easy to open and fill, and the lining easily wipes down. Containers, bento boxes and food jars fit easily for all-day fuel.

• Dimensions (Overall): 10.5 Inches (H) x 12.5 Inches (W) x 3.5 Inches (D)
• Closure Type: Zipper
• Suggested Age: 5 Years and Up
• Features Dining: BPA-Free, Handles
• Material: PEVA (Polyethylene Vinyl Acetate), Polyester
• Care & Cleaning: Spot or Wipe Clean