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Rinse the mesh filter and vessel with warm water after each batch, and wash them with mild soap as needed. The glass is dishwasher-safe; check the filter's care note before putting it in.

No. It is a coffee brewer. The smooth, low-acid character is about taste and how the coffee is made — it is not a medicine and not intended to address any condition.

The concentrate is strong, so dilute it to taste — typically one part concentrate to two parts water or milk, over ice. Store it in the fridge and use within about a week.

Cold brew is steeped in cold water for many hours, making a smooth concentrate. Iced coffee is hot-brewed coffee poured over ice. They taste different and are made differently.

Twelve to eighteen hours in the fridge is the sweet spot for a full, smooth brew. Any longer and it can turn slightly bitter, so aim for about overnight.

Hot water draws bitterness and acidity out of the coffee bean; cold water draws out the sweeter, smoother flavours. The result is a concentrate that is mellow and low in perceived acidity.