i went to pure freedom in Jan to buy a DI and battery and TDS meter when i fisrt started. i took my peter fogwill 2x25ltr trolley with me in the car to see if the battery would fit. Andy asked me what is it going on, so i showed him my trolley, he'd not seen one before.....
i wonder if thats where they got the idea from? 
Possibly. I hadnt seen one before and didnt know that Peter Fogwill had invented one.
I think this one takes the same amount of water from both 25 Litre cannisters at once.
Brilliant, but may stick with me 25 Litre one for now.
