Mimi's Saladmaster cookware, purchased from the Texas state fair ~ 40+ years ago. 3 to 4 pieces are used daily, I had no idea that these create vacuum seals, then turn down
Amazon.com: nunuware Saladmaster compatible replacement 6" long handle for vintage 1965-1994 T304S, 18/8 Tri-Clad, 5-stars, Colonial sauce pan skillet and some waterless stainless steel cookware: Home & Kitchen