I put LMNT in mine, it’s a powder with 3 ingredients ; sodium, magnesium and potassium . My boss is a nutritionist and highly recommended it. I was weary at first cuz of what most say about sodium being bad for the health. But after loads of research and putting it in my water consistently once everyday , I now drink a few litres a day. Some with and some without. I like water now, I don’t drink much of anything but water and coffee. Coffee ovs dehydrates, LMNT puts what our body’s need into our system, with a natural energy burst and hydration. I have always had trouble drinking water as well, and I’ve never felt better in my life.