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 Martinis, Margaritas, Cosmopolitans, Manhattans, Vodka Sours, and other cocktails that require ice removal before serving.