Quick answer
Cirkul does not currently offer a dedicated 'unsweetened' flavor cartridge line. Instead, you can achieve no-sugar hydration by using plain water with a Cirkul Flow Filter to improve taste, or by choosing zero-sugar cartridges like FitSip and GoSip that use sucralose rather than sugar. For a truly unsweetened experience, skip the flavor cartridge entirely and rely on filtered water.
Cirkul Flow Filter
Understanding Cirkul's Sweetener Options
Most Cirkul flavor cartridges use sucralose, a zero-calorie sweetener, to provide taste without sugar. This means cartridges like FitSip and GoSip are technically sugar-free, but they are not unsweetened—they still have a sweet taste. If you want absolutely no sweetness, you need to use the bottle without any cartridge or use a plain water setting.
The Cirkul Flow Filter (12-Pack) is a separate accessory that removes chlorine and particles from your water, improving taste without adding any flavor or sweetness. This is the closest you can get to an 'unsweetened' Cirkul experience while still using the bottle system.
When to Choose No-Sugar Cartridges vs. Plain Water
Choose a zero-sugar cartridge like FitSip or GoSip if you want a flavored drink without sugar or calories. These are great for daily hydration, especially if you find plain water boring. Choose plain filtered water (with the Flow Filter) if you want pure, clean-tasting water with zero additives—ideal for those who are sensitive to artificial sweeteners or following a strict no-sweetener diet.
Decision Rules for No-Sugar Hydration with Cirkul
- Do you want zero sweetness?: If you want no sweet taste at all, do not use a flavor cartridge. Use the Cirkul Flow Filter with plain water to remove chlorine and improve taste without adding any flavor or sweetness. Choose Flow Filter + plain water.
- Do you want flavor without sugar?: If you want a flavored drink but no sugar, choose a zero-sugar cartridge like FitSip or GoSip. These use sucralose and are calorie-free. Choose FitSip or GoSip cartridges.
- Do you need energy without sugar?: Cirkul energy cartridges like Fission Send It and GoSip Blackberry contain caffeine and other energy ingredients. They are sugar-free but still sweetened with sucralose. Great for a boost without sugar. Choose Fission Send It or GoSip Blackberry.
Products That Help You Go Unsweetened
- Cirkul Flow Filter (12-Pack): The Cirkul Flow Filter is a carbon-based filter element that reduces unwanted particles and chlorine from your water, enhancing taste and allowing you to filter and flavor on-the-go! Lifespan: 20 Gallons (about a month of typical use). If you want truly unsweetened water, the Flow Filter gives you great-tasting plain water without any sweetener or flavor. It's the best way to use your Cirkul bottle for pure hydration.
- FitSip® 6-Pack Variety Pack: This Variety Pack includes six flavor cartridges with electrolytes to help keep you in the game. Contains: 2 Mixed Berry, 2 White Cherry, 2 Orange Tangerine. FitSip cartridges are sugar-free and contain electrolytes, making them a good choice if you want a flavored, no-sugar drink. They use sucralose, so they are sweet but not sugary.
Which Option Fits You?
Best for
- People who want absolutely no sweetener or flavor—use the Flow Filter with plain water.
- People who want flavored, sugar-free hydration—choose FitSip or GoSip cartridges.
Not for
- People who want a sweet, sugary drink—Cirkul's zero-sugar cartridges use sucralose, not sugar.
