The Source Toothbrush by Radius is like no other toothbrush. The toothbrush doesn't look like it was manufactured as much as it looks like it was born. The sleek and soft curves wrap a form that just begs to be picked up. When the brush hits your hand, it has an instantly familiar feel. The brush head is oversized, which can feel strange the first couple times you use it, but that goes away and the over-large head replaces your idea of a normal-sized brush. The large head does a thorough job of cleaning both the teeth and gum line and is easily replaceable once it starts to run ragged. The Source gets its green cred from the recycled materials used to form the handle, made from flax, wood or dollar bills.