Amy, Here at the Australian War Memorial we have been involved in several time capsule projects. Our current approach is to use a length of plastic gas pipe and end caps, usually donated by the local gas company. The length of pipe is dependant on the amount of stuff to go in them. When loading the capsule we also add some Ageless Oxygen scavengers & flush the capsule with argon before sealing. to seal it we use a plastic cement recommended & usually supplied by the gas company. I think the pipe is a polyamide, & the gas company assures us that it is very durable underground. If the capsule is going to be buried, then I suggest that you include some substantial bits of metal either inside or out, so that it can be located with a metal detector. A length of insulated copper electrical wire is usually sufficient to enable it to be detected. Your local gas company should be able to advise you about this. This is important so that the capsule is not accidently disturbed during earthworks. If a gas pipe is unexpectedly struck when digging, it usually sets off a major panic. It's therefore best to bury it in an area known to be free of buried services. The last time capsule that we prepared was not buried, but displayed on an internal wall of a clubhouse, with the date for it to be opened written on it. It's not a bad idea, because then it is not accidently disturbed or forgotten. Good luck, George Bailey I am perfectly normal; Objects Conservator everyone else is a bit Australian War Memorial strange, though..... Treloar Centre for Conservation 4 Callan St, Mitchell, A.C.T. 2911 Australia Phone: (0)6 241 6122 fax: (0)6 241 7998 email: [log in to unmask]