For the cooked bones, save each, pork or beef, in separate gallon size zip lock bags and place in the freezer until you have a gallon bag full. Another option is to use fresh pork or beef bones, they are available at Tesco in Thailand, I will determine what the weight of fresh bones is to a gallon bag.
Once you have the gallon size bag of bones, place them in your pressure cooker, frozen bones are ok, no need to thaw them.
Add the seasoning of your choice to the pressure cooker; Trinity, Holy Trinity, or Asian. Only use one type if this is your first go at this.
Add water to the pot to just cover the bones, start with pouring in 2 quarts of water, if there is bones sticking out of the water, rearrange bones or if already packed in there well, just add more to just cover them. Keep in mind the 2/3 full pot rule with your size of pressure cooker.
Place the lid on the pressure cooker and lock, place the weight, the jiggler, on the lid, place on high heat.
When the jiggler starts to move and vent pressure, start your timer for 60 minutes, and reduce heat to low or medium low heat to maintain the jiggler moving and pressure releasing.
When 60 minutes have passed, turn off the heat and move to an unused burner. Allow a natural release of pressure. Keep in mind, the more water you have in the pot, it takes longer to come up to pressure, and takes longer to release pressure.
Once you have indications that there is zero pressure in the cooker, Open the lid.
Allow the broth to cool slightly, then pour through a cheesecloth lined strainer. Discard the bones and seasonings used.
Pour the broth into quart jars if you plan on using within 3-5 days and place in the fridge when cooled to room temp. If wanting to use later, pour into ice cube trays and freeze for up to 3 months.