The key to success lies in soaking the tea leaves in cold water. Simply add your favorite tea, fill it with cold water, and place the bottle in the refrigerator. This brewing method results in a smooth and rich flavor without bitterness. A filter at the top of the bottle keeps the leaves inside, ensuring a clear infusion. It's also ideal for preparing flavored water with fruits instead of tea. The original and traditional shape of the bottle will satisfy design enthusiasts. The bottle is made of high-quality glass, and the lid is made of silicone. It is manufactured in Japan according to the highest quality standards. Another advantage of the bottle is its ease of cleaning - it is dishwasher safe.