These tiny cocktail accessories are edible boats that use fluid to propel themselves forward.
Mechanical engineering PhD candidate at MIT, Lisa Burton came up with the concept for these 'Cocktail Cruisers' based on the same water tension used by insects that can walk on water.
The tiny boats are made of gelatin and require a combination of alcohol and water to propel these tiny boats. Through her research, the higher the percentage of alcohol used in the cocktail, the better the boat is able to propel itself forward. It would be truly interesting to see a small boat being able to race around the inside of your drinking glass rather than just be able to float.