Personalized Hydraulic Engineer Plunger Toddler T-Shirt. Hydraulic engineer text with an image of a toilet plunger is a humorous gift design for hydraulic engineers, college students, plumbers and home handymen and women at birthdays and holidays. 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.