・ It is a flask in the shape of a vegetable eggplant.
・ Because there is no shoulder part, it is easy to take out the sample inside and it is easy to clean.
・ Because the surface area of ​​the liquid increases when it is diagonally, the one whose mouth is slid is used for the rotary evaporator.
・ Because the bottom is round, it will be installed on the flask stand. (There is also a flask on the flat bottom)