This is a porrón. Although we harbor a disdain for accessories here at Perman Wine Selections, we also harbor an abiding belief that everyone should be in possession of a porrón. You fill this with wine and can immediately dispatch copious amounts of said wine directly into your mouth. It’s like a watering can; think of yourself as a thirsty flower.
Here is a tutorial that will show you how it’s done. Everybody wants one of these- be the first on your block.