The included protective jacket may vary in color or design due to mixed inventory All jackets are highquality and provide the same insulation and protection Despite its sizable presence rest assured that the interior capacity perfectly aligns with the specified title and selected item The size may seem larger due to its robust doublewall vacuum insulation To optimizse Hot Cold performance precondition the flask with hot or cold water and fill to maximum capacity when using it Avoid partial filling for maximum effectiveness secure the lid tightly for keeping temperature locked in 24hour temperature retention Milton Stainless Steel Bottle is designed with doublewall vacuum insulation and an inner copper coating This unique design ensures that your beverages stay hot or cold for a full 24 hours regardless of the ambient temperature So you can enjoy your favorite drinks at the perfect temperature all day long Leak proof water bottle This Metal Water Bottle has a leakproof design that prevents any unwanted drips or messes The best part about it is the flip lid that allows you to open and close the bottle with just one hand No more twisting or unscrewing caps just flip and sip Additionally the lid can be used as a cup making it even more practical and convenient