I used one, but I'm not used to it... I'll give away the remaining three. It contains xylitol, so it feels refreshing and pleasant. Once you get used to it, you can use it when you're out and about. It's compact, so you can carry it around! One is 40ml (about 100 uses). *No returns* *Please comment if you have any questions* *May switch between Yuu Yuu and Rakuraku delivery services*