A guest bathroom may be dry and dark between visits, so judge its normal conditions rather than the humidity after one shower. Use only a lit shelf or a suitable supplemental lighting position, and include the room in routine checks. Avoid crowding the sink or placing pots where guests may knock them.
The message behind the grouping
Meaning, with a little thought.
The small collection is a gesture of welcome. Keep the arrangement approachable and leave clear space for the practical use of the room.