25 year old lids get brittle

We bought a lot of wheat in buckets in 1987.  In the last few years we have found that the slightest touch or weight will shatter the lids.  They have become very brittle, so we have to keep replacing them.

This photo should also serve as a warning not to ever stack buckets on top of each other!  Maybe these lids would have held up another bucket when they were new, but not when they were older.

(Note: If I want to stack two buckets, I put a board in between them.  The sides of the buckets seem  strong enough to bear the weight if it is spread out on a board.)