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Each cup is going to be different depending on several factors. Type of silicone, processing, tooling (molds), finish, etc.
If you prefer cups without texture on the silicone, check out the Juju, Yuuki, Bella Cup, LoulouCup, StoneSoup Wings, Miu, MoonCup, FemmeCup, and FemmyCycle.
If you mean a cup with fewer/low markings or without any grip rings, check out the Mui Cup, LoulouCup, Merula, MyOwnCup, Bella Cup, Si-Bell, Casco Cup, Venus Cup, StoneSoup Wings, Enna Cup, FemmyCycle, and Formoonsa.
If neither of these are what you were originally asking, can you please clarify your answer? I’m not sure what you mean by “Clear medium”.