The Simple Modern Trek Pivot tumbler is constructed from double-wall vacuum insulated stainless steel that will keep drinks ice cold for hours. The all-new multi-use lid comes with two sip inserts, one folding-straw lid for easy hands-free drinking and a steady flow chug lid that locks into place when not in use. Each tumbler comes with a protective silicone boot to prevent scratches and dings. The wide pivot handle provides comfortable hold, making it easy to grab and go.