With the FAA liquid carry-on limitations, don’t forget to pack the new SmartMouth Single Use Packs or 2-Bottle System. These individual-use mouthwash packets fall well under the FAA liquid carry-on limit and fit easily into your purse, briefcase, or carry-on for fresh breath anytime, anywhere. You can also pack an unopened package of SmartMouth Mouthwash into your checked baggage. Please note that you should not travel with previously opened mouthwash bottles.