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.
He will, however, expect one when he brings the car back to you. Depending on how fancy the hotel is, and how far away your car is parked from the hotel entrance, tip the valet $2-$5 when he returns your car. I don't tip the employee who takes my bags from the car to the reception desk, unless he is also the bellhop who takes my luggage to my room.