Review on Sisitano 2in1 Travel French Press Coffee Maker: Portable 11.8 oz Tumbler for Ground Coffee & Tea Leaves - Perfect for Iced Coffee, Cold Brew Tea, Trips, Camping, Work & School by Chris Edwards

Very good coffee, but using the recommended ratio results in a very weak drink. According to most coffee directions on the box or can, you should use 6 ounces of 200-degree water for every 20 grams of ground coffee. However, if you're following the vendor's directions, use 12 ounces of water with 28 grams of coffee instead of 40 grams. from the "crust" before pressing the plunger for a less bitter drink. When I emailed the seller about the relationship, he just gave me a full refund instead of explaining or solving the problem. They also didn't want the device to be returned.