This invention describes a reusable cloth cover for a mug. It's designed to wrap around the mug, with a portion extending under the bottom to act as a coaster. The claims narrow this to a single-layer, rectangular, microwavable, tightly woven cloth containing a small amount of spandex, specifically engineered to radiate heat and warm a user's hands.
Why it matters: Textile manufacturing has advanced since 2009, making it easier and more cost-effective to produce fabrics with precise thermal radiation and elastic properties for hand warming, as specified in the claims.
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