Not E!!

Riddle: I start with the letter 'E', I end with the letter 'E', I contain only one letter, but it's not the letter 'E'!! What am I?

Answer: Envelope.

Source: https://www.riddles.com/index.php/4085

I start with the letter 'E', I end with the letter 'E', I contain only one letter, but it's not the letter 'E'!! What am I? — Not E!! by MelloYelloChlo v1.

Riddle: I start with the letter 'E', I end with the letter 'E', I contain only one letter, but it's not the letter 'E'!! What am I? Answer: Envelope. — by MelloYelloChlo v2.