Sichuan Locust Smart Music Speaker Thermos Bottle is crafted from food-grade stainless steel with double-wall vacuum insulation, locking drinks hot and cold for long hours. Available in 750ml large capacity, it features a built-in wireless bluetooth speaker, blank sublimation surface, interchangeable multi-style lids and fully BPA-free safe materials. We support custom full-surface sublimation patterns and exclusive Pantone color matching, ideal for bulk branded orders, outdoor travel, camping and daily leisure use.