The oil is the fuel for the light. The other version is a plastic disk about 2-1/4 in diameter with an indentation in the middle to hold the wick. With the plastic disk version the oil actually skims over the top of the disk in very narrow channel grooves until the oil reaches the wick in the middle.
There are 152 calories in a 12 oz serving of Guinness Blonde American Lager.
Alcohol contains calories (even hard liquor) and has other effects on your appetite that may interfere with your weight loss efforts. First of all, an ounce of hard liquor (gin, vodka, rum, whiskey, or scotch) contains 64 calories for 80 proof varieties, and 80 calories for those that are100 proof.