This vacuum insulated water bottle with tea leaf filter and folding hand pull-ring is made of food-grade stainless steel inside and outer. The double-wall vacuum insulation is suitable for containing any hot or cold beverages and keeps their temperature for a long time. It is safe and corrosion resistance, won't leave any metal taste in your mouth. It also prevents water from flowing too fast and chocking water, reduces spills, especially on the bus or walking. It's the best choice as a gift for family members or friends. Custom logo is available.