Stewart's makes several great soda flavors, but their bottle cap styles largely consist of a brass and white variety. However, I've found a few unique items featuring the name of the soda, making me think there's more out there.

Flavors: Diet Cream Soda, Strawberries N' Cream, Wishniak Black Cherry, Classic Grape Soda, Country Orange-N-Cream, Cream Ale, Diet Creamy Style Draft Cola, Diet Orange N' Cream, Diet Root Beer, Ginger Beer, Key Lime, Old Fashioned Cherries N' Cream, Original Peach Soda, Root Beer, Creamy Style Draft Cola (whew)

Wikipedia: Stewart's Fountain Classics

BevNET Review: Stewart's

Company Website: Stewart's Beverages