1, eat orange leftover orange peel, cut into thin strips spare.
2, the cut orange peel into the bottle, into the amount of an orange peel can be.
3. Put two tablespoons of baking soda in the bottle.
4. Add about 200ml of water and shake the bottle to melt the baking soda. You can put it in the refrigerator to soak for a while longer, so that the fresh flavor of the orange peel is incorporated into the water, and the result will be better.