Karat® PET Cups are perfect for bubble tea shops, coffee shops, restaurants and more! They offer a higher degree of durability, sterilization and clarity compared to alternative materials and are recyclable plus BPA-free. 98 mm Rim Diameter. Cup Type: Cold Cup; Interior Volume Capacity: 12 oz; Material(s): Polyethylene Terephthalate (PET); Material Type: Plastic.