How much does a mouthpiece cost? Jenny from Amabrush October 15, 2018 08:26 Updated Follow One mouthpiece costs 9.99€. We will offer a subscription model, where you can save 15% on replacements. Related articles How often do I have to replace the mouthpiece? Will there be different mouthpieces for soft, medium, and hard bristles? Do the bristles reach the gum? What are the Bluetooth features? What's the RDA value? Comments 0 comments Please sign in to leave a comment.