Being able to keep hot drinks hot for 12 hours, our bottle certainly delivers - your cuppa will be still ready to drink when you return to it well over the suggested time. It also does a great job of keeping cold drinks chilled and the mouthpiece is a good size to drink from (no water running down your chin as you take a swig). This design also comes in a range of colors, including Glossy Grey, Space Grey, Earth Blue, and Dreamy Pink.