The Triangle Flask is a leather wrapped 4 fl. oz. with an attached stainless steel lid so you don't lose it when you're wasted off cinnamon whiskey. It's extremely lightweight, coming in at 4.8 oz (empty) and the high grade stainless steel body leaves no taste. The Ashbury logo is laser etched into the brown leather giving it a rugged aesthetic, perfect for the outdoors. There is also a stainless steel funnel that comes with the flask for tidy refilling.