The Zojirushi - Stainless Mug SM-VS83/95 is a very well made stainless mug that can hold hot or cold liquids. I love the size of 830 mL and it has a lock to make sure that the lid does not open. It has a stopper as well in the lid to help. It is a lightweight design and compact and is stain and odor resistant. The opening to drink out of is wide enough but not too wide to spill all over yourself.