You may get .psd* file of Bamboo Fun tablet Photoshop tutorial by making a donation. Put the tutorial title in "Add special instructions to seller" line of PayPal and it will be sent to you shortly.
Merge all layers of the pen.
Duplicate created layer.
Adjust Opacity for bottom layer 40%.
Choose Edit > Transform > Flip Vertical.
Move the layer down.
Go to Filter > Blur Gaussian Blur 25-30%.
Load selection into original layer.
Fill it with black color in a new layer. Opacity 30-50%.