The HYDROBREW 400ml blue double wall insulated tumbler combines vibrant design with high‑performance thermal technology. Made from durable, food‑grade stainless steel, it delivers long‑lasting use while keeping drinks safe from contamination. Its double wall vacuum insulation ensures your beverages remain at the ideal temperature, whether hot or cold, without sweating on the outside. The eye‑catching blue finish adds a touch of personality, while the silicone‑sealed, leakproof lid guarantees mess‑free transport. With its wide mouth, cleaning is effortless, and it’s easy to add ice or fruit infusions. Designed for everyday use, it’s perfect for school, office, workouts, and outdoor adventures. The lightweight structure makes it convenient to carry, and being reusable supports an eco‑friendly lifestyle. double wall insulated, blue water bottle, 400ml stainless steel, leakproof lid, vacuum insulation, bpa free, condensation free, easy to clean, eco friendly, thermal tumbler, lightweight bottle, durable design, hot drink bottle, cold drink bottle, reusable water bottle, spill proof, travel bottle, everyday hydration, bold design, premium bottle