I feel fortunate to have been introduced to Tervis tumblers at a young age from Cookie and Michael. We still have our sparkle mug (very popular among our drunk houseguests or 4 year olds). It’s a collectors item now as they don’t make the mugs with moving pieces in them anymore for liability reasons or some such nonsense. I just returned from Florida for a quick conference and on my walk, stopped by a Tervis tumbler store. I gave Milo his souvenir tonight and he was thrilled. It’s no sparkle mug, but it will have to do.