An insulated cooking utensil has a first pan with a cooking surface, a second pan having a shape corresponding to the first pan, and an alignment structure for aligning the first pan relative to the second pan when the pans are assembled together. An optical component is inserted in a cavity transversally machined across an optical fiber. Prior to the initiation temperature of these endcap-to-endcap reactions, the resins are stable affording the composite manufacturer a very large processing window. 02,4nonane bromide, processes for the preparation thereof, pharmaceutical compositions thereof, and their use.