Casualties Unknown liquids and containers

Searches for combining and separating liquids come up as often as most major mechanics, about 486 a month each (third-party estimate). The system is more forgiving than it looks.

How do you combine liquids in Casualties Unknown?

Pour one container into another. For crafting, it is perfectly fine to have different fluids in one bottle, and doing so does not contaminate anything. confirmed A guide on the topic adds one caveat: new fluids you craft will not automatically go into a mixed bottle, so you have to pour them in by hand. Many players keep one dedicated container for bio-chem fluid for that reason. confirmed

Drinking a mixed bottle is another matter. You consume everything in it, so a splash of something harmful still reaches you. reported

How do you separate liquids?

A liquid centrifuge. It was buffed in 6.0. confirmed One forum poster describes having a single IV bag of mixed fluids that they could have split with a centrifuge they had found, if they had bothered. reported Community guides call the centrifuge an excellent find that is worth buying or keeping. unverified

Without one, the practical option is to avoid mixing liquids you will want to drink.

Which Casualties Unknown containers should you use?

Container	Holds	Notes	Status
Temporary bottle	Small	Created by crafting; you can drink from it since 7.0	confirmed
Canteen	Standard	Your first container; plastic, rope and bio-chem	confirmed
IV bag	Twice a canteen	Lighter, and can inject blood or saline	confirmed
Mini barrel	Large	Heavy, and common in loot	reported
Liquid pouch	Portable	Weight scales with its condition	confirmed
Grav-bag	Varies	Players report it can be dangerous	reported

The 6.0 notes also state that liquid drain speed depends on bottle size. confirmed Some containers also have category limits on what they can hold. confirmed

How do you avoid accidents with water?

Falling into a pool fills any canteen you are carrying loose, so keep crafting containers inside a bag. confirmed Your water canteen can stay accessible so you top up automatically.

Oil spreads and is hard to swim in. If it gets into your supply, it is a waste of a bottle. confirmed

How does inventory work in Casualties Unknown?

Your body has limited slots, shown on the inventory wheel: both hands, your mouth and three back positions in official screenshots. confirmed Weight is shown in units, and carrying too much slows you down.

Shortcuts worth knowing:

• Shift-drag moves a container’s whole contents to another container. confirmed
• Drag to the middle of your inventory to use an item. confirmed
• Combine stacks of dressings and scrap to save space. confirmed
• Hold Left Ctrl to see labels for items near you. confirmed

Mouth is a useful slot. A flashlight held in your mouth still points at your cursor. confirmed

What is the best bag in Casualties Unknown?

Early, a foliage bag does the job. confirmed A backpack found in loot makes crafted bags obsolete, and duffel bags and toolboxes hold a lot but are bulky. reported Mixed advice from players:

Goal	Good pick
Small light materials	Material pouch
Keeping medicine reachable	Medkit or belt pouch
Maximum capacity	Backpack or duffel bag
Selling goods	Full containers fetch a good price

A material pouch can hold any item up to 0.25 units of weight, which covers tweezers and empty bottles too. confirmed A jetpack also doubles as a small container since 6.0. confirmed

What is the best use of a mixed bottle?

A mixed bottle of crafting chemicals saves weight when you are moving between layers. Pick bottles you will not drink from, and label them in your head: bio-chem in one, fat in another. You can keep a spare canteen for groundwater you plan to purify at the next fire. confirmed See food and water for how to clean it.

Why did my Casualties Unknown bottle empty?

Check what happened recently. Pool water can replace contents, some containers leak after damage, and drinking from a large container empties it quickly because drain speed scales with size. Rounding errors were also fixed in 6.0, so tiny amounts should no longer linger. confirmed

Remember that crafted liquids land in a temporary bottle by default. Pour it into your main container before you move on, or you will end up carrying several half-empty containers.

Some liquids in the world are worth a second look before you scoop them up, so check the item text whenever you fill a bottle from a pool.