I use the Hamilton Blender, this the best single serve blender I've found, as it's all one piece with the blade built into the bottom and the top has a removable lid so you don't have to use another cup and you can take it on the go.
(Don't Forget to wash the blender immediately after use, or it will get gross)
In Full Disclosure I do benefit from the purchases you make using the links on the site (or any other items from amazon you buy after clicking on the link). This is not a get rich scheme as it’s only pennies per order, but does provide a little bit of motivation for me to keep posting. Plus I am a huge proponent of Amazon.com, it's Great! (& if you have a .edu email you can get Free 2 Day Shipping for 6 Months!)
Also if you have your own site and want to know how to set up your own Amazon Associates Account to make a little extra, let me know I’d be glad to show you how.
"Everyday in every way i am getting better and better" - Emile Coué