If you own a water filter straw for hiking or emergencies, this protective case is absolutely essential! The Membrane Solutions hard EVA case keeps your water purification straw safe from damage when you're traveling or out on the trail. It measures about 7.8 x 2.6 x 2.6 inches - compact enough to throw in your backpack without taking up much space, but sturdy enough to protect your filter from impacts, drops, and crushing. The hard shell is waterproof, shockproof, and dustproof, so you don't have to worry about your filter getting damaged by rough handling or bad weather. It's designed specifically for Membrane Solutions personal water filter straws (and other brands under 7.5 inches long), though it won't fit LifeStraw models. There's a smooth zipper for easy access, plus a built-in mesh pocket inside for storing small accessories. The package even includes two carabiners so you can clip the case to your backpack or belt for quick access. You get TWO complete cases in the package, which is perfect if you have multiple filters or want to share with a hiking buddy. Seriously, if you've invested in a quality water filter, protecting it with this case just makes sense - it'll extend the life of your gear and give you peace of mind on the trail.