30 Oz Stainless Steel, Double Wall Vacuum Insulated Tumbler by RTIC.  18/8 Stainless.  Hand wash only.

Update: Since this post was published the price, availability or promotion has changed.  Check the product page for up to the minute description, price and availability.  Also: Today’s Deals on Amazon

RTIC 30 oz. Tumbler

Recent Amazon Finds [view more]:

• 50 Quart Coleman Wheeled Cooler – $21.44
• 3 lbs Dry Golden Light Malt Extract – $12.87, $4.29/lb + Free Prime Ship
• 20 lb Propane Tank w/built in gauge! – $29.98 + Propane Tank Tips
• 10 Gallon Stainless Kettle with Ball Valve – now… $46.65, Best Price…
• Non-Contact Digital IR Thermometer – $11.99 w/Instant Coupon