Wash apples, peel and core them, and cut them into four pieces; Prepare a pot of boiling water and let it cool for later use; Prepare a can bottle with a lid, brush it and dry it. Put the apple in a can bottle, add some sugar, and then inject cold boiled water to keep the water from touching the apple. Tighten the bottle cap. Put the cans and bottles into the steamer, boil them, steam them for 15 minutes, then turn off the fire, let them cool, and take them out. The canned apples are ready.