Personalized Coolest Chemistry Teacher T-Shirt. The world's coolest chemistry teacher text with a snowman holding a bubbling beaker will tickle the funny bone of your favorite educator at birthdays, holidays and graduation. Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.