Lille Home 28oz Stainless Steel Leakproof 2-Compartment Bento Lunch Box/Portion Control Food Container with Lunch Bag and Cutlery Set, BPA Free (Blue)

I’ve used this one for a year now with my 3 year old for preschool and it’s great. He can open the tabs easily on the sides and it is so far leakproof. The small side fits a half sandwich perfectly.