Vacuum Insulated: The Simple Modern Summit water bottle is double wall and vacuum insulated. This technology keeps your beverage hot or cold for hours. Specific details for each size are listed in the description and the featured photos. No need for koozies or coasters! No matter the temperature of the liquid in this bottle, it will never sweat or be hot to the touch. Powder Coated 18/8 Stainless Steel: This reusable bottle is made from premium gage 18/8 stainless steel. This material is BPA free and will never rust or leave a bad metal taste in your mouth. Choose between the most popular and durable powder coated colors on the market. This product is not dishwasher safe but the wide mouth makes it easy to clean. Practical, Stylish Lid(s): 14oz, 18oz, 22oz & 32oz bottles all come with the Stainless Steel Lid and a Flip Lid for hot beverages. 40oz and 64oz Summit bottles come with the Stainless Steel Lid and a Handle Lid for easy carrying. The 84oz bottle comes with the Handle Lid and easy drinking Chug Lid. The 10oz bottle only comes with the Flip Lid. The Stainless Steel Lid is Double Wall and made from 18/8 stainless steel on the outside. All of these lids are leak proof, except for the Flip Lid. Premium Copper Coated Insulation: The exterior of the inner wall, in the vacuum sealed area, has been dipped in copper for added insulation. Copper reduces the transfer of temperature, adding even more insulation to your bottle. Wide Mouth: The Summit wide mouth opening is designed for easily filling with ice and larger quantities of liquid. Cleaning is made easy by the wide mouth. The the wide mouth opening is the same size for every size of Summit bottle. This means all of our great Summit lids will fit your Summit bottle! Cupholder Friendly Sizes: The 10oz, 14oz, 18oz and 22oz Summit bottles are cupholder friendly. The 32oz, 40oz, 64oz and 84oz sizes are too wide to fit in cup holders. Why Simple Modern? The S|M logo stands for more than premium drinkware. At our core, we believe that relationships are more valuable than profit. Generosity is one of our two core company values. We give a minimum of 10% of our profit away and have been able to donate product to natural disaster causes. Simple Modern products are all reusable, reducing waste in our landfills. Our products are designed to simplify your life, empowering you to be a positive impact on the people around you.