The biēm uses no flammable propellants, just heat and air. Store bought non-stick cooking sprays, like Pam®, use butane or propane in order to spray. They also operate at/under high pressure (often at or near 95 PSI), while the biēm operates at 4.5 PSI. What’s more, the biēm will not burn users because it’s designed to melt butter at its base at a temperature of just 95 degrees. The butter comes out cool because there are microscopic air holes all around the nozzle that cool the spray as it comes out.