Acid Vial is a Consumable(Grenade) item that can be thrown using the Throw action.
The liquid bubbles slightly as it dissolves any impurities on the inner glass.
Properties
Grenades
Single Use
Rarity: Common
Weight: 0.3 kg / 0.6 lb
Price: 16 gp 
UID
GRN_AcidBottle_A
Effect
- Hurl an Acid Vial that explodes on impact and deals 2d6
Acid damage.
Range: 18 m / 60 ft
AoE: 2 m / 7 ft (Radius)
Dexterity saving throw: DC 13 to negate the damage.
- Creates area: Acid Surface
- AoE: 2 m / 7 ft (Radius)
Duration: Permanent
Where to find
- Sold by:
- Derryth Bonecloak in the Myconid Colony.
Also dropped by Spike, among other enemies.