Just Slushies manufactures and suppliers of slush syrup mixes
have you heard of instant slushies check this out:
There is also “Instant” slush drinks formed by super cooling. Several
examples include Slush drinks which allows consumers to make beverages that turn to slush when opened using a conventional freezer, the Chill Chamber which allows businesses to store beverages at below freezing temperatures that turn to slushies upon opening, and super cooled Sprite from Coca-Cola (briefly marketed in the UK) which required special vending machines to store the bottles in a super cooled state so that they would turn to slush upon opening.