Keith's 12 mm Ø titanium smoothie straw is made of pure titanium, an inert metal that is completely harmless to our body, light, highly resistant, durable and non-toxic, fully respecting your health. This straw is an environmentally friendly alternative to disposable plastic straws. Keith Titanium Straw Features Made of pure titanium: totally non-toxic material and compatible with our body. Very light: titanium is 45% lighter than stainless steel, being just as strong compared to the same thickness of material. Does not give off odors or flavors. Material very resistant to high temperatures. Corrosion resistant: resists both acid and alkaline solutions, does not rust. The titanium straw can be used like a straw made of any other material, being very resistant to high temperatures. Titanium is a metal that can darken if it is subjected to very high temperatures, but not at the temperature that straws are usually subjected to in normal use. It can be washed in the normal way, even in the dishwasher, although it is recommended to wash by hand, with a soft sponge and detergent and, if desired, with a brush inside. It is recommended to use to enjoy smoothies, juices, granitas, etc. without having to use and throw away plastic straws. Store in a cool, dry place.