Personalized Nautical 40th Birthday Youth T-Shirt. Funny 40th birthday Youth T-Shirt - Heather with a big number 40 and anchors says VINTAGE VESSEL, THE ANCHOR STILL HOLDS. Perfect for ancient mariners! 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.