Instead of releasing all Ghosts one by one via Urns/Gravestones in each Household you can use the new "Release all Ghosts" Option on Urns/Gravestones. It will release all Ghosts without deleting them from the Family Tree. Ghosts that are in Households are not affected. "Get Urn for" will add a Urn inside your Sims Inventory which stores the Ghost Sim/Pet. This is helpful if a Sim dies off Lot which usually does not generate a Urn.
This is a homemade ingredient that can be used in my other food and crafting recipes. Sims can purchase this item or they can craft it from the 'Make Ingredients' menu in my Brazen Homestead Cookbook and Craftbooks. This comes in bulk and a single servings. Each bulk serving can be separated into 8 single servings that can be used as an ingredient.