Hip flasks were traditionally made of pewter, silver, or even glass,
though most modern flasks are made from stainless steel. Some modern
flasks are made of plastic so as to avoid detection by metal detectors.
Hip flasks can vary in shape, although they are usually contoured to
match the curve of the wearer's hip or thighfort and discretion in a
design also known as a kidney flask. Some flasks have "captive tops"
which is a small arm that attaches the top to the flask in order to stop
it from getting lost when it is taken off. A hip flask ismonly
purchased empty and then filled by the owner. However, the term "flask"
also applies to smallest bottle sizes of alcoholmercial markets. Somee
with small cups to make sharing easier, although generally liquid is
consumed directly from the flask.