Pressure Cooker lid. It has a safety valve and emergency release valve.
I bought a large pressure cooker so I can cook even really big roasts.
To the pressure cooker pot I added:
1 cup of chunky salsa
salt and pepper
4 carrots, cut in half
1/2 yellow onion cut into large pieces
1 tsp liquid smoke
3 cups water
Cook on med/high for 45 minutes so that the pressure cooker steam valve is making a little noise and slightly swaying back and forth. Take off of burner and let sit for 15 minutes until safety valve releases and you can open the lid. I served mine over steamed rice.
I know some people are still scared to buy a pressure cooker because of the horror stories they've heard from their mothers and grandmothers. But these new pressure cookers are not going to blow up on you. They have several safety features built in and an emergency release valve. I love mine.