Hot vapor condenses on the upper section of the Erlenmeyer flask, reducing solvent loss. The solvent is returned to the distillation flask. The hot water is typically added from a kettle or a thermo flask. After many cycles the desired compound is concentrated in the distillation flask. He boiled a meat broth in a swan neck flask. Such features similarly make the flask suitable for boiling liquids. The common volume for a Florence flask is 1 litre. The air flask was constructed from heavy forged steel. Sixpack also finds a flask of vodka which he shares with Bowman. The water remains in the flask. When Madame Dilly leaves to refill her flask, Gabey enters. This was then heated in a flask. Such a flask has a wide mouth and known as a "Kohlrausch volumetric flask". This phenomenon has been intensively characterized for shake flask bioreactors. Plating of PBMCs in a tissue culture flask permits adherence of monocytes.