Nest Festive Pura Smart Home Fragrance Diffuser: this Smart Home Fragrance Diffuser powered by Pura fills your home with our bestselling scents of the season, Birchwood Pine and Holiday. The set includes: Birchwood Pine: the aroma of a majestic winter forest is created by blending white pine, fir balsam, and birchwood over a base of rich musk and amber. Holiday: the quintessential scent of the holiday season is created by blending pomegranate, mandarin orange, pine, cloves, and cinnamon with a hint of vanilla and amber.