According to MCR, "The 'contents' of the 'bottle' are a rectilinear platform and walls which make the abstract geometry inhabitable." A dramatic staircase winds around a central courtyard, leading up to the bedrooms and eventually to the large living room. In looking at the model, the home presents a unique feeling of being at once near and far depending on where you are in the spiraled home.
Sure, maybe this house will bring up bad memories for Katniss and Peeta, but it's literally a mathematical dream home for many others. If they're looking for a resident, I will definitely volunteer!