The Press P7 and the Press P6 are both double-walled insulated stainless steel. The Press P7 is available in both 18 oz and 32 oz sizes, while the P6 is just 32 oz. The plastic handles on the press rod and body of the P6 has a stylish hexagonal design, whereas those parts on the P7 are stainless steel and rounded. The P7 also comes in a couple additional colors/finishes than the P6.