This is probably a really stupid question but I'm about to buy a glade plug in with the pumpkin spice latte insert. However, I'm having trouble finding a set including the pumpkin spice latte fragrance but I can find loads of refills in that particular fragrance. If I buy a set with the plug in "thingy" but including a different fragrance bottle, can I then just buy a refill in pumpkin spice and use it in the other plug in thing that comes with the fragrance I don't want, are those plug in things interchangeable with different fragrances? Again, apologies if its a stupid question, I've never bought anything like this before!