Like the original the new Asobu® Mighty Flask it is great, but the new version has some great upgrades. One, it is equipped with an easy grip handle that is ideal for outdoor activity. The other big improvement is the easy access spout that makes it easier drink or pour water and no need for taking the complete lid off. Enjoy the Asobu® Mighty Flask tradition, as well as these great improvements to make it even better! Double wall vacuum insulated stainless steel with copper lining. Stays hot up to 12 hours and cold up to 24 hours. 100% leak proof and BPA free.