Any good idea ( not to much ''space consuming'' ) to keep the water at a resonable temperature for long days in hot summer days....

How long the water still good to drink in a bottle?....a day....a week ...?

Thank you

FranK

Water itself isn't going 'off' very easily.

Keeping water cool
Store in dark bottles or jerrycans. Keep them out of direct sunlight and if possible relativly cool (isolate under clothes or blankets). If tempurature drops during the night, put your containers out in the open and put them away in the morning. You'll be suprised how cool it can stay this way.

Preserving water
You will find a lot of products for storing and preserving water in camping-stores (think mobilehomes and caravans) and marine-suply shops (think yachts and sailboats). I'm not talking about filtering or treating water into drinking water but about tablets or drops to prevent algea (?) grow. Most of these products are silver or chloride based and just a few drops will preserve the water for months.

Cooling water down
If you are in a dry surrounding use the modern version of the Guerba or 'desert-fridge'. Wrap your bottle, jerrycan with clothes, blankets, towels etc. keep the fabric wet, put it in the breeze of hot air (not necessairly in direct sunlight) and wait. The water will evaporate and distract heat out of the container in the process. It really works well, it will cool your drinks 10-15 degrees when it's 30 degrees C, making even 'taste' cool. You can easily cool soda- or cans in your spair socks and even 1.5 litre waterbottles will fit in (if you have large feet). You don't have to cooldown your complete watersuply constantly, just one or two bottles at a time.

A guerba is originaly a goatskin sewed together to contain water, because the skin is not waterproof the skin will 'sweat' constantly and this will start the evaporation process, in Africa you will also find big clay pots which provid cool drinking water thru the same 'sweating' process.

cheers

__________________
bart & sophie