Consumables
Consumables are 
Single Use items that are used up when activated. Due to their limited uses, they should be employed when the circumstances require it.
Ammunition
Main article: Ammunition
Ammunition items are consumables that use Ranged Weapons to deal damage and apply additional effects, such as creating Surfaces.
Camp Supplies
Main article: Camp Supplies
Camp Supplies are a type of consumable that allow characters to take a Long Rest.
Grenades
Grenades are Consumables that can be used with the Throw action to inflict Conditions, create Surfaces, or produce other effects, and can not usually be consumed in other ways.
Poisons
Poisons are consumables that can be thrown or alternatively, weapons can be dipped into them as a Bonus Action, to apply their effects.
When thrown, they act as grenades that create Surfaces. When a weapon is dipped in poison the effects last for 3 rounds, applying the poison's effect on each hit.
In some cases, weapons can be dipped in the Surface created by a thrown Poison.
Potions
Main article: Potions
Potions are consumables that restore Hit Points or grant other Effects when consumed.
Scrolls
Main article: Scrolls
Scrolls are magical consumables that allow characters to cast Spells without expending Spell Slots. Scrolls can be very useful in situations when you do not have any Spell Slots left to cast Spells.
You can cast any Spells with the appropriate scroll, even if the spell's level is higher than your highest-level spell slots.
Miscellaneous
Containers and Explosives
Nautiloid Tank
Large Nautiloid Tank
Firewine Barrel
Acid Barrel
Explosive Barrel
Oil Barrel
Smokepowder Barrel
Water Barrel
Runepowder Barrel
Runepowder Vial
Smokepowder Satchel
Tools
Other
For consumables that have no obvious beneficial use, see: