Jones Soda Co. introduced Jones Zilch, a zero-calorie soda line. Zilch is fortified with 30 percent of the recommended daily allowance of vitamin C and sweetened with Splenda. Available in single bottles and four-packs, Zilch comes in three varieties: Vanilla Bean, Black Cherry and Pomegranate. The soda also is available in a three-pack sample, with one bottle of each flavor, and retails for $4.99. Zilch launched in the Northwest market.