ErgoGrip's thermal dishware uses sealed air chamber technology, and does NOT contain polyurethane foam insulation - unlike many other insulated dishes.

Foam insulation makes thermal dishware heavy and studies have show that there is the possibility of CO2 emission from prolonged exposure in the microwave - and foam is not recylable.

Here is what makes sealed air chamber technology better:

• Dishes are microwave safe - there is no off gassing!
• Double walled construction creates a void space between the walls of the dish, which traps the air.  Trapped air does not transfer heat easily, so the heat does not escape.
• Food and beverages stay hot for longer.
• No foam insulation make the dish less expensive and 100% recyclable.
• Dishes are lightweight and environmentally friendly.