“The silver goblets in The Ultimatum are an homage to the gold goblets in Love Is Blind. We think the goblets are a subtle but fun way to tie the elements of each show together,” Chris Coelen told TODAY. And while it remains unconfirmed, TODAY said that the opaque cups are likely used so editors can cut scenes together without worrying about continuity issues.

Source: https://www.buzzfeed.com/alanavalko/reality-tv-dating-show-facts-secrets