I would argue it's also because most plastic isn't actually very smooth and these oils get caught in the "pores." It's much harder to remove spaghetti stains from tupperware than from glass.
No nonsense from my glass containers. Glass is non-reactive so you can really put anything in it without issues. Acid (like tomatoes) tend to take on a metallic flavour from metal containers like stainless, and plastic can melt if your not careful.
Oil/grease + tomato. Dawn.
I would argue it's also because most plastic isn't actually very smooth and these oils get caught in the "pores." It's much harder to remove spaghetti stains from tupperware than from glass.
Glass containers master race.
No nonsense from my glass containers. Glass is non-reactive so you can really put anything in it without issues. Acid (like tomatoes) tend to take on a metallic flavour from metal containers like stainless, and plastic can melt if your not careful.