We have Specialized create these awesome bottles.
From Specialized themselves: “Our Purist technology shields the bottle from any bad taste, mold, or staining. As pure as drinking from a glass, but with all the advantages of a flexible bottle. Nothing sticks, so your bottle stays clean and your water tastes pure. Purist infusion shields the bottle from taste, mold, and staining. Nothing sticks so your bottle stays clean and your water tastes pure.”
All our bottles include the MoFlo cap! Easy to open, effortless to use, and leak-proof when closed.