Pack of 12 individual Gender Reveal Confetti Poppers - Blue Confetti. When you've been keeping the secret and are bursting to share the surprise! Each of these single-use party poppers are filled with blue foil confetti and streamers to announce a baby boy at your gender reveal party. Each confetti popper is a cardboard tube, approximately 10cm and coloured with pink and blue dots to keep the surprise going until you and your guests twist the spring-loaded mechanisms on the bottom.