huma tea...distilled water?? car batteries and limescale in kettles?

mr humaworm i live in the UK and distilled water is not widely available. i have only found it for limescale in kettles and car batteries on the bottle it did not say it was drinkable and didnt look like it was meant to be.

is it safe for me to drink? i need it for the tea if not can i just used bottled or purified water????

many thanks
holavender
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