AVOID: Stemless Glasses make it difficult to swirl the drink to assess the bouquet, and holding the glass will warm it up to reach the wrong temperature.
HOW NOT TO DRINK COGNAC: SEE BELOW
How not to drink wine
The man in the green tie advertises for a company that managed to sell water glasses as wine glasses to increase its profit - Don't trust this man in the green tie when it comes to stemless glasses. Look at the logo - is there a stem in the logo? You see: wine glasses have stems.