With the advent of the 'crown' or more commonly known as the bottle cap, beer producers took the opportunity to advertise their products on the bottle cap opener.  The Lemp Brewery was no exception.

Many older bottle openers have a small square hole called a "Prest-O-Lite Key".  It was used to turn the valve on automobile gas headlights from approximately 1910 through the early 1930s before electric headlights were widely used.

The following are examples of bottle openers produced for Lemp products.