Just recycle the commercial soda. You can buy a 2L of pop for $.80-1.00.
Primary #1: Hidden Lake Nut Brown #2: Apple Cider
Secondary #1: Berry Rhubarb Wine #2: Black Currant Wine
Kegged: Cascadian Dark Ale, Orange Pale Ale IV
Bottles: Spruced Winter Warmer, Surly Bender clone, Big 50 Barleywine, Framboise Lambic, Dark Belgian Strong, Kicked by a Moose Scotch Ale, Russian Imperial Stout, Sparkling Elderflower Wine, Barolo Wine, On Deck: 2H IPA III