An ingenious way to save space, SAFETANK is a new invention that those of us with caravans and camper-trailers are bound to get excited about. This tank gives you 90 litres of fresh water and 90 litres of grey water in one standard sized tank, freeing up precious weight and room! SAFETANK uses a welded, marine-grade aluminium outer tank which houses a double-layer food grade bladder, safely containing the fresh water. As the fresh water is used, it becomes grey water which is directed back into the tank, but outside of the bladder.
For more information: SAFETANK