Leather Canning Jar Travel Mug by Holdster, 16oz, Genuine Vegetable Tanned-Leather Insulating Sleeve with Built-in Handle with Hand-Sewn Stitching -Ideal for Travelers, Office Use&ndash; Mason-Jar Included! Genuine Vegetable-tanned full-grain leather. Designed for a snug fit on a standard 16oz. wide-mouth mason jar. Hand sewn cross-stitch provides superior holding strength. Easily removable for cleaning/replacement jar. MASON JAR INCLUDED