I'm very happy with my purchase. I wanted an insulated bottle as I prefer my water hot rather than cold or from plastic bottles. I struggled to find a size smaller than 500ml to tuck in a hand bag, rather than a flask or mug. And since I got it it has been in constant use. My hot drink stays 'hot from the kettle' hot for 5-6 hours, and hot enough to be a hot rather than warm drink for at least 10-12 hours - I haven't tested it for any longer periods. As for cold, when I put ice cubes in it one night, there were still ice cubes in the morning. AND.... it doesn't leak(and it's red and shiny).