I say "fake it till you make it"!
The bottles had a terrible cutout. But I left that alone.
Here's the finished image.
Just make a copy of the bottles.
Move the copy behind and below with the Move Tool. You don't have to flip the image if you don't want to.
You can also apply a perspective change using free transform (Cmd/Cntrl + T)
Add a layer mask to the copy layer.
Add a Gradient to that layer mask.
Lower the layers opacity (30%) to your liking.
Now add a contact shadow by creating a new layer below the bottle layer.
Make a selection by holding Cmd/Cntrl + Clicking the bottle layers thumbnail.
Fill the selection with black.
Convert to a smart object......for fast easy editing.
Move the shadow down.
Add a Smart Gaussian Blur filter, to your liking.
Lower the layers opacity (60%) to your liking.
Done.