The butterfly eggs were put into the hatching incubator as shown in the picture above. This container was made out of a 16 oz. clear solo plastic cup with 2 oz. of artificial caterpillar food in the bottom. The top was made from circular material consisting of 2 coffee filters and aluminum foil. This top was rubber banded below the lip of the cup, and then the draping material was taped back up to the top to make observation easier. The cup was intended to raise 5 eggs to chrysalises that will hang from the paper top. Carolina suggests putting the eggs on wax paper so the food doesn't get the eggs wet. This example used a bottle cap instead, thinking the cap would keep the eggs more secure while the students carry the cups home.