While the functionality of the water bottle is clear, its appearance is what truly sets it apart. Covered in an assortment of stickers, each with its own significance, Rickie Fowler's water bottle ...

Reach for a sticker-covered thermos ... The real reason is I drink more water and electrolytes when I carry it." Fowler refills his thermos from the metal smartwater bottles seen all around ...

But the water bottles have also become a new way for owners to express themselves. Fans are covering bottles made by the Oregon company (or other manufacturers) with stickers that represent ...

One of golf's fan favorites has been walking around the U.S. Open this week with his reusable water bottle in hand. It is, in keeping with the preteen and teen trends, covered with stickers.

It is adorned with a variety of stickers, as well. Rickie Fowler talks about water bottle he carries on the course So, why does Fowler carry the bottle instead of leaving it in his bag?