Chao Container #1
You will reach a part next to a big log covered in green moss - there are some steel boxes and the bomb power-up. Directly to the left (you may have to rotate the camera round) there is a wooden fence you can somersault underneath to find the Chao Container on its own.
Chao Container #2
A vine will fling you accross to an area with a spiked robot and a path taking you underneath a falling weight. To the left will be another fence you need to somersault underneath to get to the next Chao Container.
Chao Container #3
Directly after the second Chao Container, you will be launched along three vines. After the first two, hold down on the directional pad to stop you from being launched on the third vine. Run past the enemies and to the left will be another fence you need to somersault under. You will then see the third Chao Container being guarded by a G.U.N. robot that will jump down.