Cold Cup Tumbler by Starbucks Coffee 24-oz. Starbucks Venti Custom Cold Cup Tumbler now holds 24oz. sturdy, 24-fl oz clear plastic Cold Cup with double wall construction, updated Siren logo and reusable straw. The iconic Starbucks Cold Cup. Featuring our updated Siren logo, this sturdy, BPA-free plastic version is the perfect way to enjoy your favorite iced or blended beverages. The reusable cup's double wall construction helps keep your iced tea or coffee cool, and its reusable ridged straw is hard to lose. Intended for cold beverages only, dishwasher safe.