Before revision: However, since distillation requires closed distillation apparatus and cannot be accomplished in an open vessel such as a bathtub, stories of distilled alcoholic products produced in an open bathtub are likely untrue.
After revision: However, since distillation is boiling and condensation in a closed apparatus, and cannot be accomplished in an open vessel such as a bathtub, stories of distilled alcoholic products produced in an open bathtub are likely untrue.