you didn't say which software?
In 3ds Max / Maya, for the first image you could create a simple Pill and then apply a melt / non-uniform scale. Then apply a material for the first image.
The second and third images you could extrude along a path. Make a spline in the back and forth pattern, then make a circle for the shape. Extrude the circle along the path. You could also make a pill or sphere, and modify it to deform to path using the back and forth spline. Again, apply a material for the glossy / color.
Hope that helps!
Kenny
