Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This has a major flaw for kids! The flip lid breaks easily!

We have had three of these. Two of them have had their flip lids snapped and cracked when my son or daughter dropped them--and kids drop things! The lid is just a very brittle plastic and with a hinge that makes it very vulnerable in a fall. I've temporarily fixed them with superglue but it eventually cracks again. While thermos makes great adult products, a heavy stainless steel can is a lot for a kid. So otherwise its a beautiful mug, but gets very expensive as it breaks and drops. Thermos need to modify this and avoid a design with this brittle flip lid.