Personalized Dental Hygienist Funny Floss Em Hippo Toddler T-Shirt. Funny dental hygienist or dental assistant Toddler T-Shirt - Charcoal with hippopotamus and Floss Em quote. Also perfect for a dentist or dental office staff. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.