Weight: ½ lb.
Estimated Value (Sane Cost Guide): 300 gp
DMG Value: 251 gp - 2,500 gp
When you drink this potion, you gain the effect of the gaseous form spell for 1 hour (no concentration required) or until you end the effect as a bonus action. This potion's container seems to hold fog that moves and pours like water.
Source: DMG p187