Flasks

Potions are an adventurer's best friend, but it's not always sensible—or realistic—to carry several dozen potions at once. When you need to carry a lot of potion in a little container, use a flask.

This chapter introduces potion flasks and rules on how to use them in your campaign.

Magical Flasks

A flask is a small, magically-infused bottle (or other container) that can safely hold a large—but uncertain—amount of consumable potion (or other liquid).

Unlike potions, which typically come in single-use vials, it's always hard to tell exactly how much liquid remains inside a flask—you never quite know how many uses you'll get before it's all gone.

Flasks can vary in appearance based on who crafted it, what it is made from, etc. To see what your flask looks like, roll on the Flask Appearance table below.

Flask Appearance

d12	Material	Color	Style/Design
1	Fragile Glass	Blue	Human
2	Reinforced Glass	Red	Dwarven
3	Wood	Yellow	Elven
4	Ceramic	Silver	Orcish
5	Bone	Gold	Draconic
6	Wood	Purple	Undead
7	Leather	Orange	Celestial
8	Stone	Green	Aberrant
9	Resin	Brown	Elemental
10	Metal	Black	Fiendish
11	Dragonscale	White	Gnomish
12	Plant	Teal	Monstrous

The Flask Die

Instead of tracking individual drinks, flask quantity is measured with a die—d8, d10, d12, etc. This is your Flask die—roll it whenever you take a drink from the flask: if you roll a 1 or 2, the die gets one size smaller:

If you roll a 1 or 2 on a d4, that's it—the flask is now completely empty until you can find a way to refill it.

Flask Die

d20 → d12 → d10 → d8 → d6 → d4 → 0

• GM:The orc's greatsword hits you for 11 points of damage, Clanda. What do you do?
• Clanda:Damn, I'm bloodied now. Can't risk another hit like that—I'll take a drink from my flask of lesser healing as a bonus action and get... 7 hit points back.
• GM:Great, now roll your flask die.
• Clanda:Flask quantity is d4, so I roll a d4 and get... (rolls 1) ...ah rats—that was the last of it. Ok, so no more healing—that means it's Burning Hands time...

Average Uses & Costs

Quantity	Average Uses	Cost to Buy
d20	30	22 x base potion cost
d12	20	15 × base potion cost
d10	14	10 × base potion cost
d8	9	6 × base potion cost
d6	5	3 × base potion cost
d4	2	1 × base potion cost

Getting a Flask

There are three common ways to gain a flask: find one on your adventures, buy one from a merchant, or—if you have the right tools and training—create one yourself.

ATreasure & Rewards

You may find a magical flask on your adventures—in the ruins of a wizard's tower, on the corpse of a dead explorer, in the locked chest of a rich merchant—or be awarded one as a reward for some heroic deed.

BBuy a Flask

Flasks are a rare item that—depending on your setting—may hard to find. But if you can find a vendor selling flasks, an empty flask is a small item that costs 5 gp.

The cost of a partially-filled flask will depend on its quantity and contents—see the Average Uses & Costs table for an exact breakdown.

Valiant wants to buy a flask of lesser healing with d6 quantity. One potion of lesser healing costs 50 gp, so the flask will cost him 150 gp (3 x 50).

Flask of Lesser Healing

• Flask
• Consumable

This flask contains d6 drinks of potion of lesser healing. When you take a drink, roll a flask die—if you roll a 1 or 2, the flask quantity gets one size smaller.

CCreate a Flask

If you are able to craft magic items, you may craft your own flask—if you can find the right materials.

Recipe: Magic Flask

• Recipe

• Reward 1 × Magic Flask
• Crafting Time 1 day
• Requirements 3 gp, Arcana, Artisan's tools

Qty	Material	Properties
2	Spellsealed glass	Rare, glass, force
1	Elderspiral wood	Uncommon, wood, force

Filling your Flask

If you have an empty flask and are proficient with an alchemist's kit, you can fill an empty flask yourself by combining together potions of the same type and pouring them safely into the flask. This can be done during a short or long rest.

If you don't have the requisite tools or experience, you'll need to find a trained alchemist to perform this service—pouring any ill-prepared potions into a flask will spoil the mixture, nullifying any magical properties.

Flask Refill

Potions Used	Flask Quantity
1	d4
3	d6
6	d8
10	d10
15	d12
22	d20

Refilling your Flask

Potions are volatile and don't like to be mixed. If you pour any potion—even one of the same kind—into a partially-filled flask, the contents immediately spoil and lose all magical properties.

Variant: Mixing Potions

If you want to allow players to mix potions in flasks but with some volatility, roll a d20 on the table below whenever potions are mixed in a flask. This roll should be done in secret—the player does not notice any change without first making a successful identifying action.

Mixing Potions

d20	Effect
1-5	The contents lose their original properties and become a potion of poison.
6-16	The contents are spoiled and lose all magical properties.
17-19	No change in the contents.
20	The contents lose their original properties and gain the effect of the newly-added liquid.

Variant: Topping Up

If you are proficient with an alchemist's kit, you can top-up a partially-filled flask during a short or long rest if you have enough potions. As a proficient alchemist, this does not risk spoiling the contents of the flask.

Topping Up

Flask Quantity	Potions Needed
d4 → d6	+2
d6 → d8	+3
d8 → d10	+4
d10 → d12	+5
d12 → d20	+7