I usually use a shaker for work and the blender for soup at home. When I was off I used the hand blender for the shakes and then I saw those brown bits at the bottom and thought my blender had caused it. Now I know.
Flab-U-Less, I love the strawberry shake; it reminds me of the bottled milk shake you can buy. The vanilla reminds me of either melted ice-cream or soya milk and the chocolate tastes like...chocolate, but maybe a cheapo chocolate.