Receiving "T. I. P. S." in the Tea Gardens of England

Did you know how the term "tips" came about?  Small locked wooden boxes were placed on the tables through out the Tea Gardens in England.  Each box was carved with the letters
"T. I. P. S." which stood for "To Insure Prompt Service".  Guests were encouraged to drop a coin in the box on their table when the 

tea arrived hot and satisfactory.  Thus began the custom of "tipping".

I took this photo last summer..........