A young Cabernet or Malbec can taste tight and sharp straight from the bottle, and not everyone wants to wait on a full decanter. This in-bottle pourer pulls air through the spout as wine leaves the neck, so tannins soften and aromas open in the glass you are pouring now.A snug silicone gasket seals a standard bottle neck and steadies the stream so drips stay off the label and tablecloth. Best on young tannic reds; rinse the spout right after use so pigment and sediment do not dry inside.