The 36 oz. Crossover Stainless Steel Tumbler makes all-day hydration easy, with a fill port for quick refills, leak-proof straw cap (when closed), and open-bottom handle. Features: Dent Resistant: 18/8 stainless steel protected by a durable, outer shell (TPU material) Easy-Flow Straw Cap: Flip-up straw is leak-proof when closed and centered for easy sipping-whether you're right- or left-handed Fill Port: Refill easily without removing the cap; leak-proof when closed with secure slider Open-Bottom Handle: Slides into bags, cup holders, and backpack pockets-or hooks onto straps for easy carrying 24+ Hour insulation: Double-walled insulation keeps the outside dry and drinks cold for hours BPA-Free and dishwasher safe