LMNT doesn't contain sugar, and Liquid IV has some electrolyte sticks that are sugar free, but some are not. I like the iodized salt because it provides iodine which none of the electrolyte supplements offer, and the lite salt contains both sodium and potassium, which you can throw in some water with a crystal lite or other sugar free water flavorings, and that will save you lots of money. Mostly the savings from buying salt at the store is why I recommend them.
Anything under 50° will provide benefits. The colder the temp the more of a mental challenge it becomes, plus your body will react a little differently to colder temp water
