what rebel heart says.
we've had our duckworks sprayer for three years now. the admiral actually likes it - i thought she'd mutiny when i took out our old raritan
water heater. also have a solar shower as backup but have yet to actually use it.
i liked the duckworks so much i built my own from a garden sprayer. only holds one gallon (duckworks holds two) so it's easier to conserve water.
and like rebel heart says, you can half fill it with tap water and then pour in some hot water from the teapot on cold days...