Reusable, Paperless, Ultra Fine Filter. Plastic free packaging. Made of 304 Grade Stainless Steel - Dishwasher Safe and will not rust. Works for both Regular and Wide Mouth Mason Jars and many other mugs, cups, and glasses. Create a delicious cup of coffee every time: Start by boiling water. The ideal temperature for brewing coffee is between 195°F to 205°F (90°C to 96°C), so allow the water to cool down for a minute or two after boiling. While the water is boiling, grind your coffee beans to a medium-fine grind size. A finer grind will produce a stronger cup of coffee, while a coarser grind will produce a milder cup of coffee. Generally you will get the best results with a coffee:water ratio of 1:15 to 1:17. Place the stainless steel mesh filter on top of your Mason jar or mug. Optionally, rinse the filter with hot water first to remove any residual coffee oils and to preheat the filter. Add the ground coffee to the filter and shake to level. For a 16oz pint jar, you should use about 1 ounce of ground coffee, which is about 5 tablespoons. If your coffee is fresh, pour just enough water to wet the coffee grounds, and let it bloom for about 30 seconds. Slowly pour the rest of the hot water over the coffee grounds, starting from the center and moving outward in a circular motion. Maintain a steady, slow pour to avoid over-extraction or under-extraction. Once you have poured all the water, wait for the coffee to drip through the filter and into the jar. This process may take a few minutes, so be patient. Once the coffee has finished dripping, remove the filter and discard the coffee grounds. Rinse out the filter immediately. You can put it in the dishwasher or wash by hand. Enjoy! Pour over coffee will produce different results with different amounts of coffee, types of beans, grind size, and speed of pouring water. Experiment to make the perfect cup! Oils from coffee will naturally build up over time. If you find your coffee isn't filtering through as well as before, you can soak the filter in a mixture of hot water, baking soda, and white vinegar to remove any build-up in the mesh.