2.Best metal material Titanium
3.Inhibits bacterial growth
4.Color is natural and no chemical additives ,never change color and fade
Do not overfill bottle.
Do not place bottle in dishwasher, microwave, or freezer.
Do not drink directly from bottle, pour the contents into the cup before drinking.
Add ice after you have filled the bottle with liquid.
Keep out of reach of children when filled with hot liquids.
Contents may be hot, use with care.