Investigation notes

Ari mixed cream, sugar and vanilla in a bowl. The sugar crystals were visible at first. After stirring, they could no longer be seen, and the mixture tasted evenly sweet. Ari poured the mixture into a sealed metal container and placed it in a larger container packed with ice and salt. After turning the container for 15 minutes, the mixture was thick and scoopable. Later, a scoop left on a warm bench became runny.