Ordinary stuff
Many everyday utensils have been found in hunebeds. For example axes that have obviously been used a lot, and amber beads that once belonged to a hunebed builder or a family member. And lots of used earthenware, pots in particular. They probably served as drinking vessels during funeral rituals. After that, they were filled with food for the deceased. Thus, in a few hundred years, a huge amount of pottery got accumulated in these tombs. And sometimes some of it was removed to make room for new ‘residents’.