This tumbler is used as promotional merchandise is appropriate, not only in winter to ensure that the water temperature is constant, but also in the summer to ensure that the water is cool. This 480ml stainless steel double walled insulated mug with straw is vacuum insulated and can be made for you free of charge for VIRTUAL PROOF in multiple color choices! Whether it is a gift to his wife, girlfriend, colleagues, family, leadership is a good choice, come to customize your exclusive logo it!