A 29 fl oz durable stainless steel bottle with vacuum insulation. Perfect for the wilds of the great outdoors or the hustle of inner cities. It will keep liquids cold for 24 hours or hot for 12 hours. 100% leak proof High quality stainless steel bottle with plastic free contact lid Reinforced structural ribs on body give strength and improved grip Wider than average diameter makes it more stable on rough surfaces Smooth spout for comfort drinking Ultra-strong and mold/mildew-resistant paracord carry loop With a diameter of 3.5in, it fits in most backpack side pockets