Hi all,

I was just wondering if anyone had any advice about how to do this? i work in an office with a cooler and have been told i can take an empty bottle or two if i want them. they are 18.5l aqua point bottles

But my question is how east would it be to convert them into a demijohn? is it as simple as finding a bung that fits the neck, or would it involve drilling the clip on cap to fit a bung in there.

You should be able to find a drilled bung that takes an airlock without too much problem.
Local HBS would be my start point.

ATB