What happens next?

How to store liquor in stainless steel flasks
Fill your flask with hard liquor.
Flasks are intended for use with straight, undiluted spirits. In general, it is best to fill a stainless steel flask with hard liquors, such as scotch, whiskey, rum, or vodka.

Select from:
[1]. As an alternative, fill it with fresh liquor so you have cut back on the bitterness. Close the outer lip of the flask..
[2]. Avoid adding mixers to your alcohol, since many of these contain corrosive or perishable ingredients that can damage your flask. Avoid putting corrosive or easily spoiled liquors in your flask..
[3]. You can get liquor from liquids inside other flask types, such as beer and spirits, or from alcohol in bars that contain the same amount of liquor. Remove the lock and lid from the flask, and place a mason jar lid over the inside of the flask..
[4]. You can also fill your flask with liquor for ease of selection. Empty all liquor from the inside of the flask..
[2].