Donut walls and Liquid Nitrogen Ice cream bars! Kalm Kitchen are a brilliant catering company that we recommend through our littlebookforbrides.com. Here they demonstrate some of their creative catering ideas.
Subliming 4-amino-4H-1,2,4-triazole. It is quite interesting that a molecule with that much nitrogen in it does not decompose at even 160 °C, it only sublimes a bit. Sublimation is the transition of a substance directly from the solid to the gas phase without passing through an intermediate liquid phase.