This flip-and-go stainless mug is amazing!  My son used it to take to school to keep his water in and it kept his water cold all day long.  Also we put ice cubes in it one day to take with us to fill with water for use when we got thirsty and the ice cubes lasted over two days in it without water.  The bright color is very appealing and the handle was so easy to use and to flip up to carry it with on outings.  It is very well made and does exactly what it says it does.  I would highly recommend this product to everyone.