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 - Full steel and plastic-free construction - 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 mould/mildew-resistant paracord carry loop - Fits in most backpack side pockets.