Where to Buy

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Retailers' Descriptions

Here's what other sites are saying:

Description of SmarTube Cap 63mmThe SmarTube is a drinking system hydration system, comprised of a drinking tube that fits any standard water bottle. Using SmarTube you eliminate the need to buy a hydration system with a water bladder. Instead you use a standard water bottle you can find anywhere and its always clean. Its so clear.FeaturesSmarTube cap for 63 mm Nalgene wide mouth bottle, bike bottles other containers

- US Outdoor Store