Multi-stage aerating pourer. Your wine travels through two chambers. In the first chamber into which the bottled wine is poured , it is exposed to oxygen as it gently disburses over the aerator's curves. This stage is key to increasing the flavour and scent of the wine. The liquid then flows into the larger of the two chambers ensuring it travels over the curves a second time to provide superior aeration before waiting to be consumed from your glass. Device fits directly into an open bottle. Made from borosilicate glass. Fits most wine bottles