Vials of water are often in high demand because they must be used with a herb in order to make an Unfinished potion. Players often buy them in bulk. One can cast Humidify on an inventory of Vials. Use astral runes and equip a steam battlestaff to maximise profit and efficiency. Set up one of your "Quick Presets" to Withdraw 27 vials and 780 astral runes, cast the Humidify spell, which will cause the whole inventory to fill vials with water, open the bank, Click the Quick Preset and repeat. When playing at maximum efficiency, up to 780 spells can be cast per hour, for 21,060 vials of water.