Rainbow Soda Extract (Root Beer) If you select the option

If you select the option without shutoff valves

couplers for a lifetime of leak free use

But if it begins to develop mold or you know it's become sluggish with its fermentations

5/16" OD (8 mm)

We added threads instead of a barb and now you can use the fittings you see at the bottom of this page to connect and disconnect your tubing

Rainbow Soda Extract (Root Beer) If you select the optionRoot beer extract from Rainbow Flavors. Concentrated flavor extract for making your own sodas. Mix with water and sugar, then either carbonate by bottle conditioning with yeast, or force carbonate in a keg. One 2 fl oz bottle makes 4 gallons of soda. Recipes and mixing instructions for different size batches are included. One 1 gallon jug makes up to 256 gallons of soda.