All kinds of soft drinks are very acidic, especially cola. In order to neutralize one glass of cola, it takes about 32 glasses of high pH, alkaline water. A glass of cola (with a pH of 2.5) added to 10 gallons of water with a pH of 7.4 will lower the pH of those 10 gallons to 4.6.
Aging and getting older are two different things. Getting older means maturing within the progression of time, while aging is the process of tissues breaking down in the body. Wrinkles, weight gain and sagging skin are some of the displeasing signs of aging. Getting older is not the main cause.