Definition. 1  Lactose intolerance refers to the inability of the body to digest lactose. 2  Lactose is the form of sugar present in milk. The enzyme lactase, which is normally produced by cells lining the small intestine, breaks down lactose into substances that can be absorbed into the bloodstream.
1 Tipping upon drop-off of your car is totally optional and is not done by the majority of drivers. Tip your valet when your car is returned to you from the parking lot.  A tip of $1 to $5 is the typical range, with $2-3 being most common.
After reading through the above, you know why and when to tip your limo or town car driver, but exactly how much is appropriate? Most etiquette websites such as EmilyPost.com suggest a gratuity of 15-20% of the fare, although anywhere between 10% and 20% is considered perfectly acceptable.