Grim reaper hood chathead
Acid Flask was discontinued after an update, but can still be activated if owned.
Acid Flask
Acid Flask
Release date 3 August 2015 (Update)
Members Yes
Slot Main hand
Equipment Ranged
Recolourable No
This cosmetic will not display
in PvP-enabled areas.

The acid flask is a cosmetic override available from the Death Lotus Training event, by completing the death lotus training scroll tasks once and claiming acid flasks from the prestige interface.