What cup that Cambridge United will participate in is called the Carabao Cup for sponsorship reasons?
EFL Cup The EFL Cup (referred to historically, and colloquially, as simply the League Cup), currently known as the Carabao Cup for sponsorship reasons, is an annual knockout football competition in men's domestic English football. Organised by the English Football League (EFL), it is open to any club within the top four levels of the English football league system – 92 clubs in total – comprising the top level Premier League, and the three divisions of the English Football League's own league competition (Championship, League One and League Two).
Premier League International Cup The Premier League International Cup is an English football competition for U23 players from across Europe. It was designed to provide players in English Category One academies with the opportunity to match themselves against other elite European footballers from their age group in a competitive environment. The competition was created by the Premier League as part of the organisation's Elite Player Performance Plan and is not sanctioned by UEFA.