Petro is short for petrified wood, one of my favorite finds when I go rock hunting. It is also a process where organic materials are replaced with minerals and become fossilized. (Like an event frozen in time).
These small 12oz tea mugs are designed for those afternoons where you want a little tea break. The ceramic lid keeps tea hot, creates a full extraction, and works as a coaster to hold the infuser once finished steeping.