slot1 is the panel?
if yes.. try this (not tested)

but I'm not sure is this what U want to do

Code:

---

 
entity* cofee_ent;
define holding,skill1;
in some function
	{
		ent_create("kaffeebecher.mdl",nullvector,item_kaffee);
	}
	
function cofee_event
{
 	if(event_type == event_click)
	{
		my.scale_x = 2;
		my.holding =1;
	}
	else
	{
		my.holding =0;
		my.scale_x = 1;
		if(event_type == event_touch)
 		{
 			my.pan += 5* time_step;
 		}
 		if(event_type == event_release)
 		{
 			my.pan += 0;
		}
	}
}

function item_kaffee
{
	cofee_ent = me;
	my.enable_touch = on;
	my.enable_release = on;
	my.ENABLE_click = ON;
	my.event = cofee_event;
	while(me)
	{
		my.scale_y = my.scale_x;
		my.scale_z = my.scale_x;
		if(my.holding == 1) && (mouse_left ==1)
		{
			temp.x = mouse_pos.x; temp.y = mouse_pos.y temp.z = 50; //cofee at mouse position
		}
		if(my.holding == 0)
		{
			temp.x = slot1.x; temp.y = slot2.y temp.z = 50; //cofee at slot position
		}
		vec_for_screen(temp,camera);
		vec_set(my.x, temp); //cofee will be always 50 quants front of camera
	wait(1);	
	}
}
 

---