By far, the uncontested No. 1 best selling fragrance on the list of Diptyque products. Tuberose is a very sensuous, heady scent, derived from a Mexican bulbous herb. It is also the most expensive floral perfume ingredient in the world. The matching eau de toilette is Olene. Available in candles, room mists and burning oil essences. Diptyque candles burn for an average of 50 to 60 hours.