Seasoned Advice is a question and answer site for professional and amateur chefs. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

So was recently thinking about the beer cooler sous vide method and had a thought:

While heating the water to put in the beer cooler, if you were to place an object with a high heat capacity (e.g. a ceramic coffee cup) in the water, heat both to the desired temperature and then place them in the beer cooler, would that help keep the water at a more constant temperature?

In other words, since you are replacing some of the water with a material at a higher heat capacity at the same temperature that would in turn keep the rest of the water warmer for a longer period, correct?

share|improve this question
the better way to do it would be to get a bigger cooler. More water = stays hot longer. – Brendan Jan 29 '13 at 16:37
up vote 7 down vote accepted

Water has one of the highest heat capacities available:

Your ceramic is not going to hold nearly as much heat as the water bath itself.

If you are finding that your bath is cooling too quickly then you are better off investigating your cooler.

share|improve this answer

Water itself has the highest volumetric heat capacity of most readily available materials: Table of specific heat capacities.

Adding rocks, ceramic coffee cups or lumps of iron to your beer cooler will just displace water, and lower the total heat content.

share|improve this answer

While it's true that Water has one of the highest volumetric heat capacity of any material, stones can store more heat overall.

One of the main reasons for using stones / etc for storing heat is that water is limited to 212F while stone or other solids can be heated to a much higher temperature and retain heat.

For example, the stones used in an Imu (Hawaiian Underground Oven) can be 400F or warmer. This is 330F above ambient temps (or more) while water can only go 142F above 70F ambient.

However, putting extremely hot stones in your bath isn't good for sous vide either because it will just make the water boil and what you want is fine temperature control at a specific temperature. So for sous vide purposes, stones and ceramics are impractical.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.