The diamond poem, which is also called a diamante, is a relatively new form of poetry. Many credit Iris Tiedt with its development in the late 1960s.
The confusion may arise because of research that found a connection between carbonated cola drinks and low bone mineral density.. While artificially carbonated water is slightly more acidic than still water, it's not as acidic as sugary sodas, and does not seem to significantly damage tooth enamel.
When Alka-Seltzer is placed into water it starts fizzing, giving off bubbles of carbon dioxide. This effect is greatly magnified if you place the whole Alka-Seltzer tablet in a drink that is already fizzy, since the drink will also give off bubbles of carbon dioxide.