For a healthier option, try organic BPA-free tomato paste and raw apple cider vinegar.
Before opening the pressure cooker, use one of the included plastic or other utensil to carefully turn the pressure valve to "RELEASE" and then wait 2-3 minutes for the steam to be released and the red floater valve is in the down position before opening the cooker. When opening the cooker, use pot holders, and always keep your body, face and hands away from the steam vent. Be sure to stand behind the lid as you open it so the hot steam and condensation don't get on you. As with all kitchen appliances, be sure to keep the cooker out of reach of children.