As someone who needs A LOT of electrolytes in my diet, I love having a variety of flavors and sodium levels on hand. (Always consult with your doctor for how much sodium, etc. is appropriate for you.)
Sometimes I just cannot force myself to drink another mix - iykyk. So I have a couple of tried and true hydration supplements that save the day in those times! (Always consult with your doctor before adding any supplements.)
If you don't have a good water bottle, then you're probably gonna struggle to get enough water every day. It's basically science.