Michael's yogurt is CGI, whereas Tahani's is a real prop.
Tahani makes a comment about Cindy Crawford being short, despite Crawford being 1.75m (5'9") tall. Jameela Jamil, who plays Tahani, is 1.8m (5'11") tall.
Tahani says she is the goddaughter of Princess Diana, and later she says she's the goddaughter of Maggie Smith. This is correct because in the Church of England every child should have at least three godparents: two of the same sex as the child, and at least one of the opposite sex.
This is the first episode Tahani name-drops in. She mentions Princess Diana, Johnny Depp, Maggie Smith, and Cindy Crawford.