![]() Bottle weighs just 1.3 ounces and measures 13.8 x 17.5 inches total capacity of 2.1 liters (70 ounces). So, “the copper liner needs to be: polished, installed in a vacuum, and done so in a manner that limits the amount of oxidation of the metal prior to pulling the vacuum. 8.99 - 22.99 Highest ratedin this set of products Platypus Platy 2-Liter Flexible Water Bottle 2,815 14.95 - 18.95 Most purchasedin this set of products Vapur Solid Flexible Water Bottle - with Carabiner 8,679 8. The Platypus Platy 2-Liter Lightweight Foldable Water Bottle is compatible with all Platypus caps and drink tubes, and can be paired with a water filter, and the GravityWorks Water Filtration System. “The main benefit of copper is that when it is polished, it is much more reflective of radiation heat transfer,” Johnson explained. ![]() But it works only under a set of specific circumstances. And copper can work to stop that last method of heat loss. Thermoflask Double Stainless Steel Insulated Water Bottle at Amazon Jump to Review Best Overall, Runner-up: Yeti Stainless Steel Bottle at Amazon Jump to Review Best Insulation: Takeya. “This leaves only radiation heat transfer between the walls,” Johnson said. A double-walled bottle already stops solid conduction, and a vacuum-insulated bottle stops gaseous convection. Versatile: Available with either a Closure Cap or a Push-Pull Cap accepts any threaded Platypus lid or drink tube kit. Just rinse/wash them once in a while and when its empty, let it air dry to prevent any mold from developping, but that probabpy applies to any bottle. Really bought them for life and they can really take a beating. ![]() It could work, and as Wesley Johnson, a cryogenics research engineer at NASA’s Glenn Research Center in Cleveland, explained, “For spacecraft, we often use a similar technique for insulation.” The theory behind using copper in insulation (despite its being an excellent conductor normally) is based on the fact that heat transfers through three forms: solid conduction, gaseous convection, and radiation, Johnson told us. ago I use 1L Klean Kanteen stainless steel bottles for water. : Platypus Platy 2-Liter Flexible Water Bottle : Sports Water Bottles. Sometimes manufacturers make bottles with copper linings in an attempt to keep the contents even hotter or colder. Platypus Duolock 1L SoftBottle Flexible Water Bottle - Alabama Outdoors. ![]()
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