The term 'cap lifter' is a tool used to open bottles and other containers. It is also known as an OPENER, which is the six-letter solution to the crossword. A cap lifter is usually made of metal and has a curved end that fits over the top of the bottle or container. The other end of the tool is used to pry off the cap or lid. Cap lifters are commonly used in bars and restaurants, but can also be found in many households.