SourcesEcoSoya CB-XCEL soy candle wax, $4 a lb.; and cinnamon-bark, clove-bud, and cardamom essential oils, from $2.50 for 1/2 oz., bulkapothecary.com Copper-shell half-ball, 0.32" (2 1/2", 3 1/2", and 4" diameters), from $7.50 each, necopperworks.com Clementine, blood-orange, and bergamot essential oils, from $3 for 1 oz., thesage.com