Copy and paste this into and text file in gmod9\settings\menu_props\:

 	"Popcorn Bucket (Full)"			"models\Teh_Maestro\Popcorn_Bucket.mdl"
 	"Popcorn Bucket (Empty)"			"models\Teh_Maestro\Popcorn_Bucket_Empty.mdl"

Models and skins by Teh Maestro. Not to be edited and/or submitted anywhere else without permission.