This large bullet shaped water bottle is made of stainless steel that makes it durable. It will not contaminate any beverage that you will be putting inside. Double wall vacuum insulated can keep your beverages hot or cold for a long time. It has a screw top vacuum design that better controls the temperature of your drink. It is slim that can fit your bag or backpack perfectly. This bullet shaped tumbler is uniquely designed for people who loves to collect combat gears. Custom logo is available.