Thank you so much, Sarah! We're absolutely thrilled to hear that our water bottle kept your drinks cold during your entire hiking trip — that's exactly what we designed it for! Your kind words about the leak-proof lid mean the world to our engineering team who spent months perfecting that feature. We'd love to see you on your next adventure — tag us on Instagram @HydroMaxPro for a chance to be featured! See you on the trail! — Mike, HydroMax Customer Care Team