A wine opener can come in very handy when you need quick ways to open a bottle of wine like in parties and wine tasting activities.
For low-priced, ready to drink wine, leaving it open overnight is long enough for it to spoil. On the other hand, luxury wine brands have fuller taste due to long oxidization process so they can sit for two to three days after opening.
Some wines are meant to be aged for a certain period before consuming. According to online wine knowledge resources like bascoming.com, the key to preventing wine from going bad is to keep it in an air-tight bottle. You can take a screw cap and an empty bottle of beer for wine transferring.