A parfait glass is a tall, narrow glass with a distinctive, flared shape, traditionally used for serving layered desserts but also suitable for certain alcoholic drinks. Typically holding around 8 to 12 ounces, the glass's clear construction allows for an elegant presentation of layered cocktails, highlighting the different colors and textures of the ingredients.

In the context of alcoholic drinks, parfait glasses are ideal for serving visually appealing cocktails that require layering, such as parfait-style liqueur drinks or layered shots. The elongated shape helps to keep the layers distinct, making it perfect for drinks where presentation is key. This type of glass adds a touch of sophistication and style to the serving of complex, multi-layered cocktails, making it a popular choice in upscale bars and at special events.