Crush is a carbonated soft drink brand, originally marketed as an orange soda, which was invented by California beverage and extract chemist Neil C. Ward. Most flavors of Crush are caffeine

Caffeine

Caffeine is a bitter, white crystalline xanthine alkaloid that acts as a stimulant drug. Caffeine is found in varying quantities in the seeds, leaves, and fruit of some plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants...

-free.
In 1911, Clayton J. Howell, president and founder of the Orange Crush Company, partnered with Neil C. Ward and incorporated the company. Ward perfected the process of blending ingredients to create the exclusive formula that yielded the zesty, all-natural orange

Orange (fruit)

An orange—specifically, the sweet orange—is the citrus Citrus × sinensis and its fruit. It is the most commonly grown tree fruit in the world....

 flavor of Orange Crush.