12 fluid ounces. No spill plastic straw. Silicone straw cover & handle. Made with durable food-grade stainless steel. Meets or exceeds US food safety standards. Materials: Stainless steel, silicone, polypropylene. Double-wall vacuum-insulated construction designed to keep drinks cold for up to 12 hours. Free from BPA, BPF, BPS and phthalates. Hand wash only.