Using the HydraPak Seeker 4L is a breeze. First, unscrew the 42mm screw cap and fill it with water. You can use it as is, or if you're in the backcountry, attach a compatible water filter to purify water on the go. When you're done using it, you can collapse it down by folding or crushing it and store it in the included storage bag. You can attach it to your backpack using the tie - downs for easy carrying during your adventures. If you want to use it as an ice pack, just freeze it. But remember, the maximum temperature of hot water you can fill it with is 60°C. To maintain it, simply rinse it out after each use. It's made of high - quality materials, but avoid sharp objects that could cause abrasions. Also, since it's BPA and PVC free, it's safe for your daily use.
