Walmart has Mainstays 10 Piece Meal Prep Food Storage Containers, Black for $5.52. Shipping is usually free to Walmart+ members or on orders over $35.

About this product:

Mainstays capacity 4.2C / 1L Meal Prep Containers, the food container with stackable design could well organize your space. There are 5 lids + 5 container in one set, total of 10 pieces. Clear lid enables to directly see what's inside. The container is BPA free and reusable, designed to be microwaveable and safe to use on the top rack of a dishwasher. Holds up to 4.2 cups total. Great choice for every day meal preparation. CAUTION：Do not use in ovens, under broilers, or on stovetops. DO NOT heat dry. Remove lid before microwave heating. The container will become soft after microwave heating, please be careful of liquid splash and burns when taking it out from microwave oven.