DO NOT DRINK THIS OR CONSUME IT IN ANY WAY - this is a mixture used to water your Christmas tree to keep it fresh throughout the season. If you have pets or small children who may get into the mixture at the bottom of the tree, do not use the bleach. I leave it out because I have a cat who gets into the water at the bottom of the tree. The vinegar helps the tree to take in more of the water, the corn syrup acts as an energy source for the tree, and the bleach helps to prevent mold and fungi from growing in the water or on the base of the tree. The copper in the penny acts as a fungicide and an acidifier. The Food.com computer will let me put bleach in as an ingredient (weird), but it won't let me put "a penny" in as an ingredient, so just know that "1 penny" should be listed in the ingredients list. This mixture also helps to keep cut flowers fresh.