The Thirty oz Yeti Rambler is the best! I’ve been using the same one for about 6 years and still love it!
This thing will keep ice water cold on the hotest of days for hours. I have left my Yeti in the car for several hours while at the beach and have come back to ice cold water with ice!
Click on the Yeti below to buy yours! https://amzn.to/2KEyWp0