Reusable coffee/loose tea filter. Convenient and enviro-friendly, this reusable coffee/tea filter lets you brew up a cup without wasteful and messy paper filters. It's low profile enough to be stored in just about any mug or cup and it weighs just.98 oz./28 g. SPECIFICATIONS.. Weight (Standard): 1oz. Country of Origin: Made in Germany. MSR Mug Mate Coffee/Tea Filter.