As a runner hydration is essential. This bottle is the perfect size and shape to accompany me on all of my sports and outdoors adventures. The multicolored design is stylish and easy to spot when I need to grab a drink quickly. As my tests showed, it's durable, easy to clean, and doesnt leak even when i toss it in my bag. The only downside is that it doesn't fit in all cup holders, but that's a small price to pay for such a reliable hydration companion..See full review