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Bushcraft Survival Australia Transpiration Bag

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Transpiration Bag for Collecting Drinking Water by Bushcraft Survival Australia

There are many ways to collect water and one of the most effective and energy efficient methods of doing this when you are out in the bush is with a transpiration bag which is a large heavy duty "Clear" plastic bag (a black bag will not work because you need sunlight for photosynthesis to take place for dispersal of moisture). This large food grade heavy duty plastic Transpiration Bag by BSA (Bushcraft Survival Australia) comes with instructions on how to use a transpiration bag for collecting water for consumption.

Take the bag and place it over a leafy branch or sapling of a non-toxic tree. All Wattles (Acacias) and gum trees (Eucalypts) are safe choices in Australia, and are widespread and common. 

Plants and trees draw up moisture from their root system and disperse the moisture into the air through their leaves. This dispersal of moisture takes place inside the bag where it condenses. As the water vapour and droplets get heavier, they run to the bottom of the bag. It’s possible to collect up to 700ml of water from one bag in a day. It all depends on the aspect, size of sapling/branch and area. Every tree will be different. 

The water produced may have a slight discolouration to it caused by the tannins and chlorophyll in the leaves but it tastes great and is drinkable straight away. It is best to consume the water produced through this method within 24 hours and to change branches after 48 hours so as not to damage the tree. The water does not need filtering or purifying if it comes from a non-toxic tree and is drinkable straight away. 

Water is the most important element for survival and this large food grade clear bag known as a transpiration bag will most certainly collect the water you need for survival without you having to use much effort or energy. Lightweight, compact, reusable and easy-to-use, keep one in bug out bag or backpack. 

IMPORTANT: DO NOT use this method on poisonous/toxic plants.


  • Brand: Bushcraft Survival Australia
  • Dimensions: 144.5cm x 90cm
  • Material: Food Grade High Density Polyethylene (HDPE)
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