What bottles does it fit?

GO-FILTR fits any bottle with neck opening of 1″ (27mm) or wider. We’ve tested GO-FILTR with many common brands bottles, including Swell, Nalgene, Hydroflask, Klean Kanteen, Mira, CamelBak, Contigo and it fits them all. If you purchase GO-FILTR and it doesn’t fit your bottle just let us know, our refund policy is quite flexible!