Enhance your tumbler and show your love for the KC Royals baseball with this straw accessory straw cap! Made from durable material, this cute and fun cap features an adorable design and comes with a customizable letter charm. Keep your drink clean and free from dust, germs, and bugs in the most stylish way possible! Product details: • Fits 9- 10MM(0.40 in) wide Stanley straws • Fits 20,30,40oz Stanley Quencher, Simple Modern Trek • Soft silicone • Prevents dust • BPA Free • Reusable straw topper