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TL;DR: For one daily drinker, Cirkul runs roughly $180 to $240 in year one (a $19.99 bottle plus about 48 cartridges at $3.50 to $5 each). Call it around $200. Worth it if plain water bores you into skipping it, or if it replaces a soda or a $3 flavored water you were buying anyway. …
TL;DR, We’ve used a Cirkul water bottle daily for 6+ months, plus two kid-sized bottles for our kids. The dial-up-or-down flavor control is the part competitors don’t replicate, and water consumption per kid went from a fight to a refill request. Buy it if plain water bores you to skipping it. Skip it if you …