FlyerTalk Evangelist, Ambassador: World of Hyatt
Join Date: Jul 2001
Location: NJ
Programs: Hyatt Globalist, Fairmont Lifetime Plat, UA Silver, dirt elsewhere
Posts: 46,919
I buy a travel size bottle of Listerine, toss the contents, and pour my mouthwash into it. It seals very well and even has a child safety cap.