Personalized Hydraulic Engineer Water Drip Youth T-Shirt. Hydraulic Engineer Water Drip Youth T-Shirt - White display Hydraulic Engineer in curved text dripping in water. Makes a unique gift design for civil engineers and engineering students! Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.