BUY ONE!
This cup is amazing!!!  Half the price and larger capacity than similar cups!  When I first received my cup I left it in our truck for an entire afternoon in 80+ degree temps.  By the time I got back to the truck, the ice had melted inside but the water was still cool to drink.  I love my cup so much that I bought one for my husband a mere two days later.  The manufacturing company is also great to work with and they stand by their product 100%.  Would absolutely recommend.
Rating: 5 stars