ARK's Sip-Tip Cup with select flow valve The 1 Pack includes: 1 eight oz. tumbler, 1 spill-resistant lid, 1 select-flow valve, 10 regular straws, and 1 *free* Lip Blok® (3/4"). The Lip Blok® decreases tongue protrusion and promotes correct tongue and lip position. For more information on this product see the ARK website.