There are so many ways you can be more energy-efficient and eco-friendly with your water.
Switch your showerhead to a low-flow one and add aerators to your taps.
Keep an eye on the temperature of your water too. If the water coming out of your tap is too hot, you should lower the thermostat. Just one degree Celsius can make big savings.
As for what you put your water in, invest in eco-friendly products like an eco-kettle, which are more energy-efficient so they'll save your electric bill too.