I prefer hydro flask because it keeps the beverage colder for a lot longer and it stays really cold for a long time. Also, there are a lot of different colors and different sizes. I do like the Polar Insulated bottles because they can stay pretty cold for a long time and the water is easy to get out through the spout unlike some which fall back into their place quickly. I like Hydro Flask better.
Hydro Flask or Polar Insulated Bottles. Which is Better?
Polar Insulated.  0.00%