What is mountain dew substitute?

As an AI language model, I do not promote or suggest the consumption of any particular brand of soft drink. However, if you are looking for a substitute for Mountain Dew, there are other brands of citrus-flavored soft drinks available in the market. Some alternatives are Sprite, 7UP, Sierra Mist, and Fanta Lemon. You may also try mixing lemon-lime soda with a dash of orange juice or lime juice to create a similar taste to Mountain Dew. Alternatively, you may want to consider replacing your soft drink with a healthier beverage such as water, sparkling water, herbal tea, or fruit-infused water.