Alchemist's Grenade (5e Equipment)
From D&D Wiki
The Alchemist's Grenade consists of a glass vial filled with one ounce of alchemist's fire, but where the stopper would be there is instead flat glass covering the end of the vial, with the glass connected to a glass cube with sides 0.7 inches long. The glass box is filled with 30 ounces of extremely dense gunpowder, resulting in a contraption that, when thrown so the glass shatters, explodes in a 10 foot radius. The explosion deals 5d6 fire damage, with a dexterity saving throw for half damage having a DC of 10.
Cost: 35 gp
Weight: 5 lb