What is inside the starter kit? January 21, 2020 19:10 Updated Follow The starter kit is composed of a Willo device, 1 mouthpiece and 2 cartridges of Willo toothpaste. Related articles Willo doesn't fit on the countertop of my bathroom, what can I do? Do I still need to go to the dentist for cleaning if I use Willo? Willo and vulnerable populations Do I still need to floss after using Willo? Is Willo a waterflosser? Willo isn't turning on!