Capacity: 1L; Heat retention after 6h >= 78 C; Body: Double-walled 304 & 201 stainless steel for heat retention, customized patterns and colors; Lid: 304 stainless steel material, just twist to get water; Bottleâ??s inner bottom material: 316 stainless steel; Infuser: 316 stainless steel material, removable; Color and Pattern: Optional or customized; Logo: Rang Dong; OEM: Accepted;