Every Blue Handworks design is an original. Designed in California and carefully handcrafted in Bali. Slight variations in color and shape are the nature of handmade crafts. Designed for use with tealight candles or battery tealights only. If left outside to oxidize naturally, the surface will eventually turn to a pleasant rusty patina. To help retain the original finish, spray periodically with a clear rust inhibitor or sealant.