The third guitarist and occasional keys player, Cook also contributes the occasional song and lead vocal in his kooky Zolo style. Cook has the solo project Pipe-Eye, which he launched in 2015. He typically writes and records all the music alone except drums, which are typically played by Cavs and recorded at King Gizzard headquarters. The music and videos provide an insight into the existence of Cookie, who populates his songs with seemingly mundane topics delivered in a highly idiosyncratic, kooky style that will be recognisable to fans of the handful of King Gizzard songs he has written and recorded vocals for. Cook also plays bass in The Murlocs.