The bottom left is telling that you'll need to shift letters based on the word UP.

The bottle is the only part of the image in color. The color shows that the bottle represents a specific brand of beverage.

The bottle represents 7UP. Use that information to make sense of the letters.

7UP means that you should rotate each of the letters seven times.

When you rotate the letters seven times, the message turns into:

ESS OWE DUH PEA OHH PEA

The decoded letters represent S, O, DA, P, O, P, which means the final answer is SODA POP