Bottler, Bottling Wand, Blue Bottler, Bottling Valve.

Whatever you call it, if you are bottling your homebrew, this is one handy bit of kit. 

Spring loaded, the valve attaches to your fermenter tap, put it in your bottle, turn on the feremnter tap and, just like magic  🪄 the flow of beer will stop when the bottle is full (leaving the right amount of room to add your carb drops).

Its an essential piece of brew gear that makes bottling easy and mess free.