Purist MoFlo vs Little Big Mouth: Which Bottle Fits Your Ride?
By Specialized Retail AU | Published: 2026-10-28
Category: Comparisons
Compare the Specialized Purist MoFlo 22oz and Little Big Mouth 21oz bottles to find the best cycling bottle for your needs, from taste protection to easy cleaning.
Quick Answer
For riders who want a clean, neutral taste and no staining, choose the Purist MoFlo 22oz. For maximum flow and easy adding of ice or powder, the Little Big Mouth 21oz is the better pick.
Why Taste and Staining Matter
If you've ever left a sports drink in a bottle and come back to a lingering aftertaste or stubborn stains, you know the frustration. The Purist MoFlo 22oz uses an amorphous silicon dioxide coating fused into the inner wall, creating a glass-like finish that keeps flavors from sticking. This means your water tastes like water, even on hot days, and the bottle is easier to keep clean.
The Little Big Mouth 21oz doesn't have this coating, so it's more prone to retaining flavors if you use sugary or colored mixes. However, its wide opening makes it much easier to scrub by hand or toss in the dishwasher, which can help mitigate that issue.
Flow and Convenience
When you're riding hard and need a quick drink, water flow matters. The Little Big Mouth 21oz delivers up to 50% greater water flow than the competition, so you can hydrate faster without extra effort. Its ultra-wide Big Mouth screw top also makes it simple to add ice cubes or your hydration powder mid-ride.
The Purist MoFlo 22oz focuses more on the drinking experience—keeping the water pure and free of plastic taste—rather than maximizing flow. If you prioritize taste over speed of drinking, this is the one to grab.
Trade-Offs at a Glance
- Taste and Staining: Choose Purist MoFlo if you want zero aftertaste and no stains; accept a slightly narrower opening. Choose Little Big Mouth if you can handle potential flavor retention but want easier cleaning.
- Flow and Filling: Pick Little Big Mouth for faster water flow and easy adding of ice or powder; the Purist MoFlo prioritizes taste over flow. If you use electrolyte tablets often, the wide mouth of the Little Big Mouth is a practical advantage.
- Hot Weather Performance: Purist MoFlo shields water from tasting like plastic on hot days, making it better for summer rides; Little Big Mouth doesn't offer this benefit. For hot climates, the Purist MoFlo is the more comfortable choice.
Product Facts
- Little Big Mouth 21oz: The Little Big Mouth 21oz Bottle features a tight-sealing Big Mouth screw top that's ultra-wide for adding ice or hydration powder, and provides water flow up to 50% greater than the competition. This makes it ideal for riders who want quick hydration and easy customization during rides.
Little Big Mouth 21oz - Purist MoFlo 22oz: The Purist MoFlo 22oz Bottle has an amorphous silicon dioxide coating that creates a glass-like finish, preventing stains and residual aftertaste, and shielding water from tasting like plastic on hot days. This ensures a clean, neutral taste and easier cleaning, perfect for daily use with any drink.
Purist MoFlo 22oz
Which Bottle Fits You?
Best For
- Riders who value pure water taste and no staining, especially with sports drinks
- Cyclists who ride in hot weather and want to avoid plastic aftertaste
Not For
- Riders who need maximum water flow and easy adding of ice or powder—consider the Little Big Mouth instead
