Loving these stainless steel tumbler and steel straws! so versatile and great to support the environment. It has received glowing reviews on Amazon Australia. Being insulated, not only does it keep your beverage inside cold, but the outside of the cup does not, so it is comfortable to hold. 100% CUSTOMER SATISFACTION GUARANTEE : 100% lifetime warranty, if you are not satisfied with our tumbler, we’ll give you 100% refund. If you have any questions, please feel free to contact us.