Chili Pepper Ceramic Mug: 5,048 ppm lead (inside), 11,000 ppm lead outside. Tested with an XRF instrument in 2013. Made in China.
The amount of lead that is considered toxic in a modern/newly manufactured item intended for children is anything 90 ppm lead or higher. Mugs are not considered items intended for use by children and, as such, are not regulated for total lead content as detectable when tested with an XRF instrument.