I love the Contigo stainless steel tumbler. I have had mine for many years and it is still like new. The carabiner is nice to have so you can hook it onto your book bag, or backpack. We have gone on many hikes and taken along the Contigo mug. It attached to the backpack and held enough water to keep us hydrated for a couple hour hike. It keeps drinks hot for hours after it is filled. It also keeps drinks cool for hours. The Contigo tumbler is very versatile. I mostly use it at home but it is also great for traveling. It keeps drinks hot or cold and you don't have to worry about it spilling in the car. The Contigo mug is very easy to hold. It has a good shape that makes it easy to grab and hold onto. I have had many mugs that are awkward in my hand and slip out. The design and shape of the mug are good. This mug is good for all family members. From the person on the go, the college student, and the office worker.