I am filling a HydroFlask with boiled water so I do not boil the kettle as often

I enjoy a lot of cups of tea so would usually boil the kettle a high number of times throughout the day. Now, I boil the kettle once, fill up my HydroFlask and use it from this which saves money and energy. A small contribution but a good one that I would encourage us tea and coffee drinkers to do more!