Personalized 13th Anniversary Robot Couple T-Shirt. 13th Anniversary Robot Couple Retro T-Shirt - Purple gift for her has 13 years and he still jiggles my bolts message. 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.