fire truck wet bag

My son is not ready yet to go to bathroom, so to put the wet cloth training pant, the people from the day care asked me to get a wet bag...of course i made one, after looking few tutoriels on line, here , and here too, i realized it was just a pouch with a zipper and a plastic like fabric inside:

outside fabric is "fire trucks"

i put planes PUL fabric inside:

and attached a fire truck polymer clay charm on the zipper,( i did for his drawer's knobs):