Last night, a friend of mine had a lot of trouble trying to get through a security with a sealed jar of his cat's ashes. The remains of the 17 y.o. cremated pet were in my friend's carry-on and were to be carried to the cat's birth place.
Luckily, the fellow had anticipated trouble and had "armed" himself with a picture of the cat, a note from the vet and the cremation certificate. He got through after 15 minutes of hustling by the security.

gsthome, maybe you should get a note from your doctor ( psychiatrist ? ) that you need Silly Putty to relieve stress otherwise you'd go berserk on the flight