On a new layer draw a shape like this and fill with a gradient:
Then on a new layer draw a elliptical shape and give it gaussian until you get something like this, then place that below the layer having the main shape:
Next, draw a elliptical shape for the top:
After that, place an image which will be used as an cover for our can:
Then go to Distort -> Spherize and use these settings:
Now change the blending option to "Darken" and click between the top two layers while pressing the ALT key:
If you want to change the color of the can just apply a gradient to the second layer:
To make the can dark or light you can use curve tool by pressing CTRL + M:
Your final product should look like this:
More Tutorials: 
