Humangear GoToob Airplanecarryonapproved Patented,awardwinningdesign. Made from soft, rugged silicone. Largeopeningmakesiteasytofillandclean. Easy to squeeze out all the contents. IDwindowonthecollarhelpsyourememberwhatsinside. FDA foodsafe - 100% BPA, PCand phthalatefree. Thecollarismadeoftworingsthatunsnapfromoneanother.TheouterringhasanIDwindow,andthe innerringlistscontentindicators.Simplysnaptheouterringoffandbackontodisplay"Soap,""Lotion," andmore.Ablanksettingletsyouwriteinyourowncontentindicator.