Made of FDA compliant materials. Lid has a visual open/close push button locking closure comes apart for easy cleaning Vacuum insulation provides optimum heat retention at least 9X longer. 18-8 Stainless Steel dual wall, Copper lined vacuum insulation Available in 16 different colors options Patented leakproof screw on lid which has a lip groove, that allows you to position the drinking spout without looking 18-8 Stainless Steel. 2.75" D x 2.75" W x 9.25" H