Prep Naturals Glass Meal Prep Containers

Borosilicate glass with snap-lock lids and a silicone seal. They don't stain from tomato sauce, don't absorb smells, don't warp in the microwave, and don't leach chemicals when heated. A 5-pack runs about $25-30. The glass is oven-safe to 450°F, which means you can bake directly in them and serve from the same container. The lids are interchangeable across sizes, solving the universal problem of losing the right lid. They're heavier than plastic — that's the tradeoff — but they'll last years instead of months.