The Grayl UltraPress is a pull-and-push water purification bottle that removes 99.99% of viruses, bacteria, and protozoa, making water safe to drink. This bottle provides a clean drinking water solution to people who enjoy hiking off the beaten path, providing safety and peace of mind in locations where clean water isn't a given. Our Rating 4.5/5★★★★★ 📝 System Specifications Capacity500 mlWeight354 gramsHeight9.