Permanent 23k gold plated one cup coffee filter, maker. Makes a great cup of coffee anywhere, anytime. Great for the office, traveling, or when you just want that one cup of coffee at home. To use, remove cover and inner perforated sleeve and add ground coffee in on top of gold plated filter. Replace perforated insert sleeve (water regulator) inside and on top covering gold filter and ground coffee. Then place the combined two pieces on top of your favorite cup or mug. Pour in 195 degree water to the capacity of your cup and then cover with the top lid to keep heat in while brewing. In minutes you have that one perfect cup of coffee. The brewing is finished when the regulator is empty. Reverse the lid and use it as a drip catcher underneath the filter. The one cupper is reusable for many years, easy to clean and top rack dishwasher safe. Filter is made of stainless steel with 23 karat gold plating. You taste the coffee, not the (paper) filter. Made with all quality materials that will not absorb flavors... with plastic parts that are BPA free. Buy it once, and use it daily for years to come. Made in P.R.C.