Personalized Traffic Eggineer Drawstring Bag. Eggineers are engineering eggheads and this humorous traffic eggineer with a traffic light, a hard hat sporting a road and directional text will bring a smile to your engineer on birthdays, holidays, and graduation. A durable and versatile cinch bag built to handle daily use. . With its lightweight design and reinforced corners, this pack is perfect for the gym, travel, or everyday activities.