Place the soy wax in the microwave safe bowl or measuring cup.
Use a microwave-safe container, the soap gets very hot.
Place your clear soap base in a microwave-safe container.
Pots made of borosilicate glass (like Pyrex) have the distinct advantage of being oven and microwave safe.
Depending on the size of your party, you may want to make several batches of the taco meat filling, store it in your refrigerator in microwave safe bowls, and heat the filling, as is needed.