Walmart has Mainstays 3-Compartment 1L Round Meal Prep Food Storage Container, 5 Pack for $4.86. Shipping is usually free to Walmart+ members or on orders over $35.

About this product:

Set of 5 with 3 compartments which allow storing various food for perfect lunch. Capacity 4.2 Cup food storage Containers save space with stackable design and keep your pantry well organized. It was made of BPA Free polypropylene material with a clear lid and black container. Mainstays container is good for meal planning and portion control and reusable. Plus, the containers are dishwasher and freezer safe, remove lid before microwaving. Beware of the heat after microwaving.