Food-Grade 304 Stainless Steel: Made with 304 stainless steel, our sublimation tumblers are reliable and suitable for hot and cold beverages. Ideal for coffee, smoothies, cold drinks, and water at home, in the office, at the gym, or during commutes Even & Firm Sublimation Coating: The sublimation tumblers bulk features an auto-spray process, creating a smooth, long-lasting coating for clear transfers and bright colors. It is suitable for DIY projects, small business use, and personalized creations All-Day Hot & Cold Performance: Double-wall vacuum structure keeps drinks cold for up to 12hours and warm for up to 8 hours. Our sublimation cups are great for long workdays, outdoor trips, driving, or staying hydrated throughout the day Leak-Resistant Lid Design: A secure PS lid paired with a sealing silicone ring helps reduce spills during carrying. These stainless steel bulk tumblers are suitable for use in bags or cars during daily travel