Being part of the white color present in the background and cone.
1. Use any technique that removes the white background and white part of the cone.
a) Add Alpha channel to the layer.
b) With the Fuzzy Select Tool selected, set the threshold so that except for orange, everything else is selected. (Here I used about 107 for the threshold)
c) Delete the selection. Only the orange part will be left.
2. Still with the deleted area selected, create a new transparent layer (layer02) and fill it with a color shade close to the cone but darker (I used b26241). Identified now by Cor02.
3. Invert the selection
a) create new transparent layer (layer01) - Between the original layer and layer02.
b) fill it with a darker color tone than the one used in Cor02 (I used 562F1F). Hereinafter referred to as Cor01.
c) Select - None
4. Apply DropShadow to Layer02
a) Reference values (others may give better results):
Color - black
Blend Mode - Normal
Opacity - 100
Ang - 120
Dist - 10
Spread - 1
Size - 0
Noise - 0
5. In layer02 - Filter - Decor - Add Bevel (Thickness = 20)