AT Armor's stainless steel double wall water bottle, the ATWB (because we all need a few more acronyms in our lives). Dark as night black, laser engraved with the logo that lets everyone know you have high standards when it comes to your gear and equipment. Stainless steel, no cheap bunk ass aluminum here. BPA free. 17 oz of awesomeness. The AT Water Bottle has a double wall vacuum construction to help preserve the temperature of your beverage longer. Screw on steel cap with a quality o ring seal. Hand wash only to protect that high gloss paint job. Double wall insulated so do not place this on a heat source.