Kelly's first employee pick is the CamelBak water bottle. CamelBak has taken its bite-valve system and put it on a water bottle. It fits in a water bottle cage and is also easily taken in the car, to the gym, around town, etc. It is also great for kids. It is big enough that mom or dad is not constantly refilling it, and the bite-valve helps keep it from spilling. Another big plus is that it is extremely tough (Kelly knows this because all of her young children use them) and dishwasher safe.
Stop by and check them out. They are one of those items that once you use them, you'll find that they are indispensable. They also come in lots of fun colors! They would make a fun stocking stuffer for someone.