Starbucks Blue Cactus Flower Acrylic Tumbler Yellow Lid 24 Oz Heat Bump See Pics.

The cup was probably put through the dishwasher which resulted in a small bump at the lip of the cup. Because of this, the lid doesn’t sit flush all around. However you can tighten enough to have a great seal if you plan to use the cup. Also from the front it is not visible. Offers welcome!