WHAT IS YOUR X? What is your passion, the motivation factor which drives you? We at H2X believe our performance drinkware supports all active lifestyle needs and equips you for any adventure! Our durable, portable, functional and stylish Ultra Collection is made of the best materials while well-designed accessories enhance the user experience... so you can focus on your PASSION, not the product! Our 30oz Ultra Tumbler is made of kitchen-grade 18/8 stainless steel with double-walled, vacuum insulated construction to eliminate condensation and maximize heat and cold retention. Versatile slider lid accommodates sipping or straw use. Base has silicone sleeve for added grip and fits standard car cup holders. Non-toxic, non-leaching and BPA FREE.