drzewo korkowe in English:

The champagne cork popped out.

On last New Year's Eve I lost my eye, when a cork from a bottle of champagne exploded in my face.

Every gentleman should know how to get a cork out from a wine bottle.

Remember to cork the bottle after you stop using it.

... you can't put the cork back in?

Alex seemed to learn nouns such as "paper," "key" and "cork," and color names such as "red," "green" and "yellow."