Brandy used to distill brandy: A cucurbit was filled half full of the liquor from which brandy was to be drawn and then raised with a little fire until about one-sixth part was distilled, or until that which falls into the receiver was entirely flammable. This liquor, distilled only once, was called "spirit of wine" or "brandy". Purified by another distillation (or several more), this was then called "spirit of wine rectified". The second distillation was made in "balneo mariae" and in a glass cucurbit, and the liquor was distilled to about one half the quantity. This was further rectified as
What Love Is Made Of extremely positive about "What Love Is Made Of", describing it as "darker than anything" from "On a Mission", while calling it "slinky". The reviewer went on to commend the "irresistibly pouty" chorus. Pitchfork Media's Katherine St. Asaph commented that, in the song, the singer "sound[ed] completely enthralled, by either her lover or the music" and complimented her voice, noting that it seemed "ten times bigger than before". Jordan Sargent of "Spin" magazine called the track "exuberant" and highlighted Katy's vocal performance, which he deemed "typically fantastic", while the team from pop music website Popjustice gave "What Love Is Made Of"