which version of container is it and what condition is it in? if it is the old short and square can with the rounded corners it could have some collectors value if it is in good condition. the powder could be ok if it was stored in the cool and dry place otherwise I would throw it away
if it is the paper and metal version with the plastic spout it depends up on how well the powder was stored. if it wasn't stored in the cool and dry place I would probably throw it away if there is any doubt at all.
if it is the all plastic container I would think that it would be ok to use