Chao Container #1
When you get to the third pillar that you knock down with the dynamite, you can see a double spiked ball trap spinning just on the other side of it. You can see the first Chao Container behind there.
Chao Container #2
After the first checkpoint and making your way over the moving platforms, you can see the second Chao Container next to a fuel cylinder and a pillar you need to knock down.
Chao Container #3
When you get to the part with lots of urns place under a small shelter, the last Chao Container is on a pillar just to the right of where you jump to continue onwards.