I would highly recommend Hydratem8 bottles. Very good quality and great design. I had so many different bottles in the past but none of them was as good quality. I’m currently doing Jo Weeks 90 day plan and I need to drink 2.750 litres a day and I know that I need to refill 3 times a day my new bottle ? Before I never knew how much I was drinking through the day but now I know?Really happy with it. Now will buy for my kids too!