This
glass aerator from AKhomery helps open up red wines in seconds, so you don't have to wait hours for the wine to achieve its ideal flavor profile.
Exposure to air enhances the flavor of good red wine, a process called aeration. The standard way to let a wine's flavor profile "open," as it's called, is to simply pull the cork out of the bottle an hour or so before you serve the wine. A better way to do it is to use a wine decanter, but that still requires some waiting.
If you want to aerate your wine in mere seconds, do it with the AKhomery Glass Wine Aerator. I own and use this gadget a few times a month, and have done a number of side-by-side tests of the same wine poured through it or served right out of the bottle, and there is a noticeable improvement when you use this thing.
Many wine aerators are made of acrylic. This one is hand-blown glass, so the only material the wine touches is completely inert, not affecting the flavor of the wine in any way save for, of course, the aeration.
This is another product that seems like it costs more than it does, but it's only around $20.
Pros: Glass does not affect flavor, rapidly effective, good price
Cons: Fluid occasionally accumulates inside walls of the unit