Nilfisk-ALTO Taski Hako and WAP TW300S dirty solution water recovery tank in translucent plastic, it goes under the clear dome.
This machine has been put out in many different guises and colours by different manufacturers.
I've seen it mainly as the Hako Homeclean in light lilac colour with lilac tinted dome.
Taski used to call it the Aquamat 10 in Orange with a smokey brown coloured dome.
WAP did it in yellow and Nilfisk-ALTO in Blue. Again, this usually had a smokey brown coloured dome.
At the moment, as standard postage within Australia, is capped at a maximum of $20, Maximise the saving on postage and buy several Puregiene toilet rolls a box of Tissues and some soap or maybe some packets of dustbags, or a hose or a new floor tool, or some other accessories!