While Hiking or exercising, a good Nalgene bottle is the best way to go:
Or, if you want more, you can get a water bladder:
Now, while hiking, you might encounter streams, brooks, or other natural sources of water, but they might not be safe to drink, due to microscopic bacteria or other little particles that could be harmful to you, causing dysentery or worse. What you would do in such a situation is use water purification tablets, activated charcoal, or a water filter pump to clean the water so it’s safe to drink. Here are a few possibilities:
Give these filters a try and let me know how your hike goes!