https://naturalspasupplies.co.uk/shop/water-pots-amphora-handmade/

The benefits of starting with tap water is that it is bacteria free and much lower in microplastics than bottled water. It is cheap and you don’t have to carry it around. However tap water can contain contaminants such as chloride, fertilizer, pesticide fragments and heavy metals. Improving tap water has involved water filter jugs with over-engineered plastic cartridges or expensive home installations which can strip all of the minerals out of the water. However, tap water can be improved using low-tech, ancient techniques such as practised by the Romans using clay amphorae and at Natural Spa Supplies we think that this is the most practical and planet friendly solution. Tests on our amphora have shown that they do purify, detoxify, condition and energise tap water.