I found a mixer today that is battery operated, VitaMinder Personal Power Mixer. I found it at Rite-Aide, a local drug store here in my area of Washington. I paid $10 for it and it did a great job mixing my liquid and unjury protein powder. I was looking for something I could take to work and not have to rely on power and be fairly small. Camping or traveling will be a breeze as well. YOOHOO!!