This is a set of four matching advertising tumblers in clear glass, decorated in red, blue, and yellow with the Diet Pepsi slogans in the 1980s. One side says Uh Huh and the other says You Got the Right One Baby. Each tumbler is 5" tall. There is a spiral optic wave in the glass. They are marked with the script L for Libbey on the base. All four are in excellent condition with no chips or cracks or wear to the decoration.