Stainless steel replacement cups with nipples for ELT Cages Pop the dish in the stainless steel ring and turn it for a secure lock Stainless Steel European cups are stronger and thicker then Chinese cups. 10oz. - 4 2/16" Dia. x 2 1/8" Deep 20oz. - 5" Dia. x 2 1/4" Deep 30oz. - 5 7/8" Dia. x 2 1/2" Deep 10oz. cup fits the NEW Aluminum Carriers. If not sure which cup size you need then measure the diameter of the cup and depth.