Fill'er up with the good stuff. The Sigg Black Oval with Cup ($30) is perfect for holding grandpa's old "cough medicine" for an extended weekend hiking or camping trip. Originally designed for the Swiss Army, this aesthetically pleasing, sleek and stylish flask is made from a single piece of 18/8 stainless steel for a leak-proof and seamless design. The retro-style 20 oz. Black Oval includes a detachable, built-in stainless steel cup with a swivel handle and leather straps.