Cut a black circle of craft foam approx 3'' across and cut a hole in the center just a tiny bit smaller than the top of the smoothie container. The craft foam will stretch when you slide over the brim of the container. This piece is put on the container to look like the brim of a hat. Use a black permanent marker to color the top of the container to finish the hat look. Draw eyes and a mouth with marker. I used a red permanent marker to draw some buttons. Use up scraps of craft foam or felt to make the carrot nose and scarf that can be glued directly to the bottle.
Check out the Mom Tried It Site for more fun winter ideas