Decantus Classic. The DECANTUS Wine Aerator is a unique by-the-glass wine aerating system. The DECANTUS Wine Aerator utilizes the Bernoulli effect where the reduced pressure of a stream of fluid (wine) draws an air flow through diagonal thin tubes inside the Decantus. The wider opening on top and larger liquid capacity of the top reservoir bowl makes pouring into DECANTUS™ Wine Aerator much easier than with the Vinturi. Wine travels faster through the Decantus without a whirlpool effect, because of the vertical planar insert. The “froth” from Decantus has finer bubbles giving smoother aeration than any other aerator on the market.