Portable cold brew system with a 30oz stainless steel tumbler. - Brand: MASTERMIND - Model Name: KOLD BREW - Capacity: 30oz / 0.9L - Accessories: Filter, Lid - Material: Stainless Steel Thank you for viewing. Extracting coffee components from beans can be tricky with nel drip, requiring technique, and French presses can leave the unwanted flavors and bitterness of the beans. Siphons and coffee makers take up too much space. With 【Mastermind】's cold brew, there's no need for troublesome steps or techniques. Simply put ground coffee into the filter, close the lid, and set the filter in the included tumbler. There's a water level line inside the tumbler, so you won't overfill it. Then, let it sit for 9-24 hours to your desired strength, and you'll have incredibly delicious coffee. Stored at home. Although it's new and unused, the outer box has some damage. I also use it, and it's easy to make cold brew coffee. Recommended for coffee lovers, especially for the coming season!