The reed diffuser works very well, the scent lasts a long time, and the components are used over and over. After a quick web search, I found that there are scented oil recipes available online that help the DIY'er to make diffuser refill scent at home! Most home-made substitutes for common commercial products can be made more economically, and ingredients may be purchased in bulk, which reduces product packaging.
Consider ways to eliminate items that use unnecessary electricity! Consider ways to eliminate as many "disposable" products from your life as possible!