This is the only marked aMERICAN baby bottle we have ever had for sale. It is that rare. It is about 6 _" high. The mark of Boardman & Hart is found on the outside bottom and is very strong. Circa 1825. We don't think it was ever used much as the condition of the metal is mint. The metal is heavy enough that when filled with milk, it would not be comfortable to use. Since no one would be using it today, it should not be a problem.