I love this Contigo Core SS Autoseal 24 oz water bottle in Licorice.  The design is perfect for my family.  The size is great for a day at the office or a day out hiking.  We also try to avoid plastic water bottles as much as possible, so I love this steal design.  I also really love the autoseal to avoid leaks.  It's easy to lock, open, and carry.  Plus, it's easy to clean which is so important!