NUK Juicy Puller Silicone Pacifier in Blue and Yellow, 0-6 Months, 4 Count
$4.99
NOT an ad-on item (yet).
http://www.amazon.com/NUK-Puller-...PDKIKX0DER
Edit: Temporarily out of stock but can still order and it will ship when available (which is usually fairly soon)