A durable, collapsible camp mug made from stainless steel and EU food-grade silicone rubber, designed for compact storage and reliable use on any adventure Innovative design collapses down to 1.25 inches (31 mm) for easy storage and expands to a full 16-ounce (475 ml) capacity for hot or cold drinks Cool-Grip fins molded into the sidewalls offer a secure, comfortable hold even with hot or cold beverages Sea to Summit’s most rugged collapsible mug yet, engineered by the original inventors of collapsible tableware Made from BPA-free, EU food-grade silicone and 304 stainless steel; collapses to 1.25 inches in height The combination of BPA-free, EU food-grade silicone rubber and 304 stainless steel makes the Detour Collapsible Mug the epitomy of packable and durable. The Cool-Grip fins molded into the side walls protect you from hot or cold for a more comfortable grip and it collapses down to a fraction of it's original size for nesting and storage. When space is at a premium, this is the premium 475ml mug you want.