I use pork fat , go to your local butcher and buy 1-2 lbs. of pork fat ,, when you get home use a double boiler , the same they use for melting chocolate,, the fat will change to a liquid ,, you then put it thru a cloth mesh to clean out the parts that don't melt ,,Then get a bowl with ice and water, and put a 2 inch medicine bottle into the middle of the ice bowl, then pure the liquid fat into the bottle, after when it cools down you have a clean white fat glob.. I have been using this now for 5 years with great results.. it will make about 5 medicine bottles worth,,,,
If and when you get a bear ,, do the same , I hear that's what was used by the mountain men,,,,