The fine mesh perfectly retains ice and other ingredients used in preparation, such as fruit pulp, ensuring only the liquid passes through. It is placed over the mouth of the mixing glass or the part of the shaker from which the cocktail is poured. The spring adapts to any surface, ensuring a perfect fit. Essential for preparing Martini, Margarita, Cosmopolitan, Manhattan, Vodka Sour, and other cocktails where ice needs to be removed before serving.