Spirit Stainless 7-PC Cookware set

Steel alloy, with a minimum of 10.5% chromium content by mass and a maximum of 1.2% carbon by mass.

Stainless steels are most notable for their corrosion resistance, which increases with increasing chromium content.

Sustainability
Stainless steel is 100% recyclable.

Safe Cookware Material
Stainless steel along with cast iron is considered a safe cookware material – as Teflon products (commonly present in non-stick cookware) are notably and potentially harmful, some newer chemicals are used in replacement but so far little is know and only further studies can determine its safety.

Tempered or toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass.Tempering puts the outer surfaces into compression and the interior into tension.

As a result of its safety and strength, tempered glass is used in a variety of demanding applications, including passenger vehicle windows, shower doors, architectural glass doors and tables, refrigerator trays, mobile screen protectors, as a component of bulletproof glass, for diving masks, and various types of plates and cookware.

As a downside, tempered glass is not recyclable as it is a very different from common glass.