Someone posted this info in one of the threads I am in and I thought it was worth sharing here.
I just bought an Oster MyBlend ($25 at Walmart) and it is wonderful to make smoothies! You just put your ingredients into a sports bottle, screw on a blade and blend. Then switch the lid to a drinking one and off you go! Nothing to clean except the two lids and the bottle, all of which go into the dishwasher.
I'm drinking my first smoothie right now and this thing will get used a LOT!!