In a world where staying hydrated is essential for maintaining good health, Cirkul has revolutionized the water bottle game.

Cirkul water bottles feature single-use cartridges ... which equals roughly four refills of the 32-ounce size. The cartridge ...

Cirkul claims that its flavor cartridges last for approximately 132 ounces of water, which equates to 11 12-ounce refills, ...

each holds enough flavor for six bottle refills — as being "fun and convenient for folks to enjoy water in their way and also do a good thing for the planet," Waggoner told Bloomberg. Cirkul ...

Starbucks has a little-known perk for members of its rewards program: Free refills on drinks, regardless of your original order. As long as you're a rewards member and you don't leave the store ...