Creating an alternative to filtration tablets Lifestraw created the original 'LifeStraw' filtration straw system that allows the purification of freshwater. Lifestraw comes in 650ml drink bottle or a personal straw. The bottle is a handy for scooping up water on the go, ready to drink straight away. The personal straw is perfect for hikers, weighing only 46gs the straw is compact for your day pack or hiking pack.