User blog comment:Penguin-Pal/Unlockable Puffle Water Bottle - What's going on?/@comment-4243521-20131201125214

case 1: return 'SORT_ROOM'; case 2: return 'SORT_WALL'; case 3: return 'SORT_FLOOR'; case 4: return 'SORT_PET'; default: return 'SORT_OTHER';

Yup, pet furniture. I believe it can appear as any, then once it's placed it converts itself.