It's a cup, a shaker, a mixer, a measurer, an opportunity to share.
The only thing it won't do is break.
The super sturdy Nalgene tumbler can dress up a casual picnic table just as easily as it can cool down a serious hiker.
It's the latest innovation from the company that's conquering thirst, one cup at a time.
Separating the inner and outer cup the first time requires a couple of squeezes to break the seal.
After that it's easy.