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SmarTube cap for standard 30 mm water bottle, bike-bottles, and other containers.
Here's what other sites are saying:
Description of SmarTube Cap 30mmThe 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 it's always clean. It's so clear.Features:SmarTube for 30mm bike-bottles and other containers
- US Outdoor Store