Brew iced coffee with nothing but ground coffee and water.
Put 85g of ground coffee into the strainer, set it in the pour spout, and pour in filtered water a little at a time. Once you have poured in 1,100ml of water, put on the cap and gently rock the bottle from side to side to encourage extraction. Brew in the refrigerator for 8 hours and it is ready.
Cold brew coffee keeps well, and you can enjoy it without any loss of flavor for about three days after it is made. Beyond coffee beans, you can also cold-brew black tea, green tea, and more.
Because it is square, it can also be stored lying on its side.