The 25 oz. Canteen was specially designed to fit a full bottle of wine. This canteen can keep both cold drinks cool and hot drinks hot. It is crafted from stainless steel with proprietary triple insulation. The 25 oz. Canteen has patented easy-grip flat sides with a No-slip bottom. Keeps drinks ice cold for up to 25 hours or hot for up to 12 without freezing or sweating. Drinks that contain ice will stay cold even longer.