The season when cold beer is indispensable comes over soon. Therefore, gadget company Green House released "Beer Foamer" of a beer whisk using the supersonic wave.
This is whisk of the stick type of 43 grams in weight and makes creamlike heads by supersonic vibration of 40,000Hz. Foam made with this is very small and keep for a long time. How to use is easy, place this in the glass which you poured beer and only touches a switch. The power sources are two tetramorphism alkali dry cells and you can use it in succession for about one hour.