A walking stick is a device used by many people to help keep their balance while walking. Others use them as an accessory. Walking sticks come in many shapes and sizes, and can be sought by collectors. Some kinds of walking stick may be used by people with disabilities as a crutch or cane. The walking stick has also historically been known to be used as a defensive or offensive weapon, and may conceal a knife or sword as in a swordstick. The "tippling cane" contained a flask usually to hold a small amount of liquor. The Quarterstaff and the Shillelagh are also walking sticks.