Well I found way to make Root Beer in a 2 liter bottle and its not to bad. Give it a try if you want and let me know what you think of it.
"Root Beer in a bootle”
Things you need:
clean 2 liter plastic soft drink bottle with cap
1 cup measuring cup
1/4 tsp measuring spoon
1 Tbl measuring spoon
cane (table) sugar [sucrose] (1 cup)
Zatarain's Root Beer Extract (1 tablespoon)
powdered baker's yeast (1/4 teaspoon) (Yeast for brewing would certainly work at least as well as baking yeast.)
cold fresh water
1.Using a clean bottle and a dry funnel, add the ingredients in sequence as stated in the steps that follow. First add a level cup of table sugar, (or cane sugar). Adjust the amount to achieve the desired sweetness.
2.Yeast on sugar
Measure out 1/4 teaspoon powdered baker's yeast, and place in the funnel. The yeast should be fresh and active, and any brand that is available will work.
3.Shake well to make sure that the yeast grains are distributed evenly into the sugar.
4.Swirl the sugar/yeast mixture in the bottom in order to make it concave and enable it to catch the extract in the middle.
5.Replace the funnel, and add 1 Tbsp of root beer extract on top of the dry sugar.
Notice how the extract sticks to the sugar. This will help dissolve the extract as seen in the next few steps .
6.Fill the bottle halfway with fresh cool tap water that has only a little chlorine. Pour through the funnel and use this opportunity to rinse extract stuck to the funnel and tablespoon. Swirl to dissolve the ingredients.
7.Fill the bottle to the neck, this time with fresh water, leaving only about an inch (2.54cm) of head space. Securely screw the cap so as to seal the bottle. Invert repeatedly to thoroughly dissolve the contents.
8.Place the sealed bottle at room temperature for about three or four days until the bottle feels hard to a forceful squeeze. Then move it to a cool place (below 65 F (18 C)). Refrigerate overnight to thoroughly chill before serving. Crack the lid of the bottle just a little to release the pressure slowly.