Holdster Leather Canning Jar Travel Mug 16oz. (Mason Jar Included) Rivet Without Handle - The Perfect Drinking Vessel - Made in the USA Premium Leather Canning JAR Sleeve with Copper Rivets Genuine Vegetable-tanned full-grain leather Designed for a snug fit on a standard 16oz. wide-mouth mason jar. Hand-tapped copper rivets ensure simple beauty and superior holding strength. Easily removable for cleaning/replacement jar. MASON JAR INCLUDED