From Swanz website: "Porcelain has been used for cooking, storing and drinking beverages for centuries. Traditionally, there are many health benefits associated with porcelain. Our fine porcelain specifically is known to be able to enhances the aroma and flavor of the food and beverage. Using this special porcelain that contained calcium, Swanz is whiter, lighter and also stain/ corrosion free. All of our products are made of high quality materials. The grade of the stainless steel vessel we used are 304 stainless steel grade which are sturdy and corrosion free. To make Swanz even more special, Swanz products are also vacuum insulated. They keep your food and beverages to be hot or cold for at least 3 to 5 hours." This is the SY-068 model of the Swanz Novelty Series.

• Interior is made of fine porcelain to retain original taste of beverage. No stainless steel to leach into beverage.
• Vacuum insulated to maintain beverage temperature for 3 to 5 hours.
• Fits most vehicles' cup holders.
• Patent pending technology.
• Capacity: 11.83 fl oz, height: 7 in, diameter: 3 in, weight: 15.87 oz

Interior is made of fine porcelain to retain original taste of beverage. No stainless steel to leach into beverage.Swanz