My daughter stopped sucking her thumb with this! It's effective even in small amounts, so I haven't used much of it. However, I knocked it over and about half of it spilled out. It's very bitter even in small amounts on an adult's hand, so I don't think I'll be able to use the rest of it. I think it's still enough to help stop thumb sucking, but since it's been stored at home by an amateur, please refrain from purchasing if you are concerned about the condition. ★ To reduce the thickness, I will fold the box and wrap it in bubble wrap for shipping. #StopThumbSucking #Kamupita