Elephant toothpaste: Set a soda pop bottle in the middle of a pan to catch the toothpaste. Mix these in a separate container and swirl together for a minute. ** 2 tbsp warm water, ** 1 tsp yeast. Mix these in your soda pop bottle: ** 1/2 cup 6% hydrogen peroxide. Pour the yeast mixture into the soda pop bottle...and be amazed!