The Vevor 8-pack sublimation tumbler set is designed for creating personalized drinkware with a white heat sublimation coating for custom designs. Each 30 oz straight tumbler is made from food-grade stainless steel with double-wall insulation to help keep drinks hot or cold. The set includes lids, straws, shrink wraps, gift boxes, and ribbons for added convenience and presentation. These tumblers can be customized using either a sublimation oven or a heat press machine. They are a practical option for DIY gifts, events, and custom drinkware projects.