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I take it with frozen ice packs and as soon as we get to site, hand all the extra sets, in the morning take your old packs to be frozen and pick up your others and repeat through the day and the rest of your time, i might try the sock ideal tho! nice one.

Crows Nest - Tuesday to Friday.

Kirsten

OK here goes...

Water cannot go below 0 degree celcius (otherwise it would freeze and become ice).  The ice in the bucket is floating around in water, and it is actually only the water that is in contact with the bottles, so normally, even though the ice itself will be below 0 degrees C, the water and therefore the bottles will not go below 0.

However, salty water has a melting/freezing point below 0 degrees C (how low depends on how much salt is dissolved).  Adding salt to an ice/water mixture means the water (now salty water) can go below 0 - it will keep on getting colder until it reaches the temperature of the ice (or its freezing point).  What makes it get colder is a transfer of heat between the ice and the (salty) water - it takes a lot of heat to melt ice (this is called the latent heat), and this heat comes from the salty water, which consequently gets colder.  I guess typically the temp of the salty water will go down to -5 or -10 degrees C, depending on how much salt you dissolve.

There endeth the science lesson for today.  Class dismissed.

Well, you did ask...

Quote: Originally posted by arthurdent on 24/5/2007

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If you park the car on grass, leave bottles on the car floor overnight, they'll be chilled by the morning. But don't forget to take them out before the sun starts to warm the inside of the car !

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  ,PLEASE please, ensure that the tops of the milk dont leek when lying down especialty if youve opened them...

  its a hefty insurance bill to replace the soundproofing and carpets after milk has soaked in ....cuz its the only way to get rid of a gut wrenching smell.....believe me

  happy camping

    OutWard....