i know it will work

1. borrowing misery from future

2. carrying grief of the past

Tetsubin has a 400-year history rooted in the Japanese Tea Ceremony and is valued worldwide for its elegant craftsmanship and its ability to enhance the flavor of water—making tea taste richer, milder, and smoother. It also releases trace amounts of iron into the water, offering health benefits, especially for those with low iron levels.

SHOP

Rounder flavour and less harshness are both symptoms of harder water, and I really don't have to explain how if you put iron in the water it's harder.

So the first thing is pretty much untrue if the rest is true.

Also tetsubins are annoying to take care of because of rust and the western style enameled tetsubins are annoying because the enamel cracks with temperature variations.