Abstract: An article of manufacture delivers a substance to a selected environment. In an embodiment, the article includes a substrate with at least a portion formed of a porous first material into which an active ingredient is impregnated, and a protective layer of a second material extends over a surface area of said portion to reduce degradation of the active agent. The article may be an oral device, such as a toothpick or chewing stick. The porous first material may be bamboo, and the protective layer is optional. An optional anti-stick layer covering a portion of the protective layer is also disclosed. A method for producing the oral device is also disclosed.