What is the best liquid to preserve a Christmas tree?

I’ve heard that regular tap water is fine, but I’ve also heard stuff like Sprite and sugar water. What is the best liquid to give a Christmas Tree so it can live long and smell good? I’m not looking for home recipes unless they’re easy to make.

The main thing is first of all cut off the end of the trunk, so liquids nan be absorbed by the tree.Also use warm(not hot) water to keep it watered. Sugar would be best. because it is like the sap in the tree.If you want add a few drops of green food coloring.As with flowers the color will be brought up w/ the water.