You are under the effect of the Bless Allies spell (no concentration required).

This blue potion bubbles and steams as if boiling.

The sapphire concoction within the stoppered vial bubbles endlessly. For this reason, the stopper is porous enough to allow steam to escape without allowing more than a slow ooze of the valuable liquid to escape when roughly handled.

I Drink an Potion of Heroism
Turquoise steam rises out of the flask as the potion gently simmers. I take a drink and feel a rejuvenation in both body and spirit. I square my jaw, ready for whatever challenge awaits me next.