Nathan Hammerhead Stainless Steel Water Bottle. Thermos style Triple Insulated 18oz/24oz/40oz Flasks. BPA and Lead FREE – Keeps Liquids COLD for 35 Hours & HOT for 15 Hours

Love the shape of this bottle!

Both my son and myself have been using Nathan water bottles for a couple of years. They live up to the expectations keeping the liquid cold for up to 36 hours. We love it and will continue to order these if available .

Es muy bueno, aunque considero que mantiene un poco menos de lo prometido el agua caliente y fría

A little bit smaller than I expected, and kind of on the pricey side. One thing I will say though, very high-quality. And the white is kind of sparkly and really glossy.The shape of it is very ergonomic and easy to hold unlike the competitors version that is around. Small standard ice cube fits.

It doesn't leak and it keeps my water ice cold all day - my only two requirements for a water bottle so I'm happy. The rubberized outside makes it easy to grasp, especially since I have small hands. I'll mention only two drawbacks in case these two things are important to you. First, it won't fit in a cup holder very well being that's it's square shaped and not round. Second, the spout is somewhat small in diameter - slightly smaller than, say, the opening of a typical 20 oz. bottle of water. Not a deal breaker but wish it could be just a tad larger.Edit: Noticed the top of the bottle is square but tapers to round toward the bottom.