Cirkul water bottles feature single-use cartridges. The cartridges flavor the water every time someone sips from the bottle.

The Cirkul (available at Cirkul) water bottle is joining the hydration craze, offering uniquely customizable flavor cartridges that offer benefits like hydration-boosting electrolytes and caffeinated ...

With Cirkul's system, you fill up your bottle with water, then insert a flavor cartridge and adjust the flavor intensity — no mess required. Cirkul offers more than 50 flavors, which range from ...

Those three things alone should give you a pretty good idea of what you need in a good elk cartridge. It should be flat-shooting, pack a punch downrange, and deliver a bullet that upsets reliably ...