The Hygienna Solo was designed to work with water bottles which have a mouth opening diameter of 19mm-22mm, with 20.5 being the ideal. Therefore the Solo will not work well with water bottles which have a larger opening diameter. Recognizing that this is a problem for some of our customers we are working on introducing a cascading collar for the Solo which will allow it to work with water bottles which have a larger mouth opening diameter, making the Hygienna Solo a truly universal adapter!
If you're having trouble finding a water bottle which the Hygienna Solo works with in your country then please contact us and we will do what we can to help you locate one. Likewise, please continue to share your feedback with us as we look forward to receiving and reading them.
Stay tuned and stay clean!