A suitable gift?

We saw these frequently before in our last trip to Thailand, but this is the solitary example so far this time. These are 'monk offerings'. Monks are dependent on gifts of the population, so there are ready made 'monk gift packs' in stores, all coloured orange, as that is the colour of their robes.
M. has wondered what happens if a monk is gifted 5 identical buckets. Can they swap them?