Abstract: A package for delivering a fluid volatile substance includes an impermeable shell that defines a reservoir into which a liquid volatile substance, such as oil, may be at least partially filled. A microporous membrane is placed in covering relation to the reservoir to allow emanation through capillarity of the volatile substance. To absorb any liquid that may seep through microporous membrane during use or storage, an oleophilic layer is heat sealed in covering relation to the microporous membrane. Finally, a foil barrier layer is sealed to the shell in covering relation to the microporous membrane. The foil barrier is releasable and once released will activate the volatile substance contained within the reservoir to transition from its liquid phase to a gaseous phase with the vapors carrying the scent of the volatile substance.