Removable divider for rectangular stainless steel container
Amazon.com: Bin Buddy Clear Plastic Storage Box with Removable Dividers | Size 10.5" X 4.5" X 1.75" Overall | 6 Sections Each Size 1.5" x 4" x 1.25" | Customize Storage Space
LocknLock Tritan Purely Better Rectangular Food Storage Containers with Dividers, 12-Ounce, Set of 4 - Walmart.com
Glass container with dividers and bamboo lid
MealBox™ 4-cup Divided Glass Food Storage Container with Turquoise Lid | Pyrex