They're not cheap, but they will last you 30-50 years, maybe a lifetime. They're Rubbermaid Sulfon-X commercial cookware. They're usually amber in color, but some are clear. They're actually the same continers you see at a buffet holding the food over a vat of hot water.
Here's a linkl to start you off: (I have no financial interest in this product.)
Rubbermaid Amber Sulfonx Insert Pan 1 9size Case Of from Sears.com