DataGoo
DataGoo (DG) is a discontinued data storage product developed by Sony. Created to replace the aging Horse MiniDisc standard, DataGoo offered an increased capacity of 10 minutes of audio playback per millilitre.
Adoption

DataGoo immediately saw worldwide adoption, quickly usurping the Compact Disc, DVD, MiniDisc, Horse MiniDisc, writing things down on paper, and remembering.
Safety Concerns
While Sony has always maintained that DataGoo is harmless when consumed, many have reported dire consequences.