Here is another blender that lets you make smoothies anywhere. The Ayyie USB Rechargeable Smoothie Blender has 4 blades to crush frozen fruit and nuts. It is made of non-toxic materials and runs on 2 x 2000mAh batteries. You can make 20 cups of smoothies on a full charge.
The magnet is hidden inside the body for safety. The blender also has a Tritan cup and 20,000RPM motor.