Table 2. Pressure cookers utilized in this study.

Prices are as advertised on Amazon.com and working pressures and temperatures are found in their respective user manuals.

Pressure cooker brand	Model number	Working Pressure (PSI)	Working Temperature (°C)	Price paid in January, 2018	Price in June, 2018
COSORI	CP018-PC	5.8–10.0	113–115	$120.93	$89.99
Gourmia	GPC-800	Up to 10.2	N/D*	$129.99	$79.99
GoWISE	22623	7.2–13.0	88–99	$80.10	$79.96
Instant Pot	IP-DUO80	10.2–11.6	115–118	$129.99	$139.99

*Not disclosed in the operating manual.