On a good sunny day, it will take approximately 1-1/2 hours to boil water. The device is capable of pasteurizing water (pasteurization is reached at 65 °C (149 °F) and it would usually take about 90 minutes. The Cooksack will work with high thin clouds or in partly cloudy weather, but it will take longer to reach the desired temperature. It is highly recommended the use of the suitable Kettleblack, a pot with a special heat absorbing coating to maximize the heat absorption. It can also be used in a small campfire, if needed, when there is no sun. To ensure useful product life it is recommended that the CookSack balloon must be dry before storage. Also, care should also be taken to minimize scratches to the mirrored surface by smoothing the ground beneath the CookSack and folding it careful
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| - On a good sunny day, it will take approximately 1-1/2 hours to boil water. The device is capable of pasteurizing water (pasteurization is reached at 65 °C (149 °F) and it would usually take about 90 minutes. The Cooksack will work with high thin clouds or in partly cloudy weather, but it will take longer to reach the desired temperature. It is highly recommended the use of the suitable Kettleblack, a pot with a special heat absorbing coating to maximize the heat absorption. It can also be used in a small campfire, if needed, when there is no sun. To ensure useful product life it is recommended that the CookSack balloon must be dry before storage. Also, care should also be taken to minimize scratches to the mirrored surface by smoothing the ground beneath the CookSack and folding it careful
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| abstract
| - On a good sunny day, it will take approximately 1-1/2 hours to boil water. The device is capable of pasteurizing water (pasteurization is reached at 65 °C (149 °F) and it would usually take about 90 minutes. The Cooksack will work with high thin clouds or in partly cloudy weather, but it will take longer to reach the desired temperature. It is highly recommended the use of the suitable Kettleblack, a pot with a special heat absorbing coating to maximize the heat absorption. It can also be used in a small campfire, if needed, when there is no sun. To ensure useful product life it is recommended that the CookSack balloon must be dry before storage. Also, care should also be taken to minimize scratches to the mirrored surface by smoothing the ground beneath the CookSack and folding it carefully after it is dry, rather that crunching it up. It is sold at an approximate retail price of $59.95 (US$).
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