Keep Hot& Cold Both Nice Dould Lid Design Healthy Material, BPA-free old and Hot water preserving. Preserve water for 4-6hours; anti rusty, food grade materials; high quality 304 stainless; Best gift choice for your love ones; Business outfit design, simple and fashionable; Two layer protection; ✨NEW! We now Accommodate Personalize/Customize Service! For more details kindly reach out to our customer service! for cold water preservation test, 4 hours preserving time for 5 celsius, 6hours for 8 degree;