This is a candle-type oil warmer (air freshener) co-produced jointly with BP. As the tea light candle heats up the glass, the fragrance oil or essential oil will begin to vaporize, spreading a pleasing aroma around the room. When the glass warms up with the tea light candle, the fragrance expands into the air by volatilization of fragrance oil. 
This set also includes a small fragrance oil sample of the BP original scent, Burbs. A green woody scent featuring a blend of woody aromas such a Douglas fir, cedarwood, and sandalwood, plus a touch of nutmeg.

[INCLUDES]
Metal base: 2
Heat-resistant glass*: 1
Tea Light Candle (Burn Time: Appr. 4 Hours)

Made in Japan / Size: H 130mm, W 130mm