I purchased the CC Tumbler and didn't check the fit of the lid until I returned home a few days after the cruise. The blue travel lid didn't have the secure fit/grip as our larger Tervis tumblers but I thought it would be okay until my tumbler fell over, the lid flew off and water went everywhere ! I emailed Tervis to let them know our family loves their products and described the situation and asked it they thought the lid may be defective or if it was perhaps the tumbler. The Tervis rep is shipping a new travel lid to me and is hoping that will solve the problem. Tervis has great customer service! Just wanted to share in case anyone else has a lid that doesn't securely grip their CC, AquaDuck or DCL tumbler.