- SWELL. 10600-H20-57000. SLIDE-OPEN TUMBLER LID. Put the cherry on top of your S"well Tumbler. The Slide-Open Tumbler Lid is splash-proof when closed and ready for any adventure. This tumbler accessory is BPA/BPS-free and designed to keep the heat or cold inside. Slide-open for effortless sipping, slide-closed while traveling.