If you don’t have one of these, get one. I have been using a similar product all Summer long and it has been so nice to have a cold beverage all day long! Walmart has the Ozark Trail 30-Ounce Double-Wall, Vacuum-Sealed Tumbler marked down to just $8.74! (Regularly $12.00) Choose from stainless steel, white, pink, gray, teal, or green. Be sure to select free in-store pickup to avoid shipping fees. Otherwise orders of $35 or more will ship free.