Question: how are slushies made at sonic?
Answer: The Sonic Slush is made from flavored syrup combined with crushed ice, and the result is a sweet, refreshing, and (obviously) slushy concoction loved by people all across the country. The Slush comes in four sizes: small, medium, large, and the ginormous Route 44, which, as you probably guessed, is a 44-ouncer.