Lifestraw Peak Series Personal Straw Filter Carry Case dark mountain gray Designed to store and protect your LifeStraw water filter straw Compatible with: LifeStraw water filter straw, LifeStraw Peak series personal water filter straw and LifeStraw 2-Stage Membrane Microfilter Small and lightweight The shock-absorbing hard shell protects against bumps, and shocks LifeStraw is proud to a B Corp and Climate Neutral Certified brand, committed to meeting the highest standards of verified social and environmental performance, transparency and accountability