TrailBottle Vacuum Stainless Steel is a double-walled vacuum insulated bottle made of stainless steel that keeps your drink cold or hot for a long time even in extreme temperatures. In other words, it is perfect for both a ski trip or that summer hike. The bottle has a powder coated surface, which means that you get a firm grip even when it is wet. The water bottle has a large opening which makes it easy to fill it up and to clean it. There is a strap attached to the lid which makes sure that your cap will not go missing and it can also be used to attach the bottle to your backpack. The lid does not contain BPA, phthalates or other chemicals. No matter how many times you fill the bottle, your drink will stay fresh.