70 ounces of water, a snack, your tools, and a layer should be sufficient for any ride up to about 15 miles. Coincidentally, that's exactly what the Dakine Shuttle Women's Hydration Pack is designed to carry. It includes a Hydrapak reservoir with a high-flow Phaser valve to ensure you make the most of each gulp. It also has a fleece-lined sunglasses pocket to keep your shades safe when you pull out the goggles, and a breathable air mesh back panel and shoulder straps to help you avoid cold-and-sweaty-back syndrome when you stop to take a photo or grab a bite. An internal pocket and pump sleeve keep your tools and extra supplies from turning into a mess, so if you have to stop for something unpleasant you can get back to riding faster.