Can I use multiple codes on the same order? March 13, 2019 17:51 Updated Follow You can only apply one discount, coupon, or promotional code per order. If you have questions, chat with us or email us at firstname.lastname@example.org. Related articles Where can I order the $44.95 Shyn toothbrush? How do I apply a discount code, coupon or referral code? How does a subscription work? Does Shyn ship internationally? Can I apply a code to my existing subscription?