Our Filter Straw is designed with convenience and safety in mind. It's easy to bring along with you for any adventure, or even just your daily routine - and it's even compatible with your favorite travel mugs. Delicious Drinking Water - Wherever You Are Whether you encounter an emergency situation or just a questionable drinking fountain, you can be confident that your water us cleaner and safer with our Filter Straw. Use it for: Camping, Hiking, Travel, or just in case of Natural disasters. No-Fuss Design! Each package includes both a straight and angled straw that fits perfectly in your favorite bottle, travel mug, or tumbler - without skimping on filtration technology. Easy disconnect allows you to change your straw's filter in a flash. The packaging is a reusable waterproof storage bag to hold your straw and filter when not in use.