Stanley IceFlow Stainless Steel Tumbler with Straw - Vacuum Insulated Water Bottle for Home, Office or Car - Reusable Cup with Straw Leakproof Flip - Cold for 12 Hours or Iced for 2 Days

The product is designed to keep drinks cool for a Considerable amount of time with a built-in handle making it easy to carry around. However, there have been some drawbacks as highlighted by customers. According to one reviewer, they bought two of the product for their kids, but both had to be thrown out because they leaked over their bags repeatedly. Another reviewer claimed that it was challenging for an eight-year-old to open it independently. The straw that pops up is quite challenging to open and close. Nevertheless, another reviewer stated that the bottle doesn't keep ice for long, and it leaks when tipped upside-down, which is a significant drawback. Overall, the product design and function allow for easy portability, but it has significant shortcomings that may make it less desirable for some.