Very solid good looking cup. Lid is a snap on type and it is not super easy to get the satisfying "click" when you put it on giving you the confidence it won't leak when you drink from it. But good enough for the price. Fits in both sizes of my cup holders in my car really snugly even though its pretty plump.
I have concerns about how tough this cup is in the long term. I ran my order of 48 cups through a water bath in my sink to rinse off the manufacturing dust so they'd be ready to use. Even though they weren't in the sink more than 4 minutes, 6 of my 48 got water drops in between the two acrylic layers. I have ordered the Spirit 16 tumbler in the past and even though they are 3 years old, none of my four have been penetrated like this. The Spirit 16 has a much heartier top edge bonding the two layers together and a screw on lid.