\begin{definition}[Definition:Imperial/Volume/Pottle]
The '''pottle''' is an imperial unit of volume.
{{begin-eqn}}
{{eqn | o = 
      | r = 1
      | c = '''pottle'''
}}
{{eqn | r = 2
      | c = quarts
}}
{{eqn | r = 2 \cdotp 273045
      | c = litres
}}
{{eqn | r = 2 \, 273 \cdotp 045
      | c = millilitres
}}
{{end-eqn}}
\end{definition}