The Tapered Plug For The 20 oz Yeti Cup Are A Hollow Silicone Plug Made Of High Temp Silicone Good To temperatures Up To 600 Degrees F Used For The Purpose Of Powder Coating The Yeti Without Any Wrap Around Leaving A Professional Finish Every Time. These Plugs Have A 3.000 Bottom Diameter, A 3.500 Top Diameter And Are 1.500" Long