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He could tell at once that they carried different sorts of bubble bath mixed with the water though it wasn't bubble bath as Harry had ever experienced. One tap gushed pink and blue bubbles the size of footballs; another poured ice-white foam so thick that Harry thought it would have supported his weight if he'd cared to test it; a third sent heavily perfumed purple clouds hovering over the surface of the water. Harry amused himself for a while turning the taps on and off, particularly enjoying the effect of one whose jet bounced off the surface of the water in large arcs.