• 100% MEDICAL GRADE STEEL LINERS: [proof] cups are made from super high-quality 316 Medical Grade Stainless Steel (also called 'Surgical Stainless Steel'), the highest quality steel available on the market. This means a water bottle that will last far longer since it is more corrosion resistant than other bottles on the market that use a lower quality 18/8 or 304 grade steel.
  • 12oz DOUBLE-WALL INSULATED: [proof] bottles are 100% vacuum insulated which means they are sweat-free and will keep your keep your beverages COLD for up to 24 hours and HOT for up to 12 hours.

Proof Double Wall Vacuum Utility Cup, 12 oz


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