Personalized Trick Or Treat Bat Maternity Shirts. Funny Halloween White Maternity Shirt with cute vampire bat and stars says TRICK OR TREAT in purple and orange letters. Perfect for Halloween parties. 5.5 oz., 100% combed ringspun cotton jersey tee. taped neck. topstitching on collar. double-needle stitched sleeves and bottom hem. Available in sizes Small, Medium, Large and XL.