I guess a lot of you might already heard about this little miracle, but for those who have not I would like to introduce you a Water Closet with in-built cistern. How amazing and space saving is this? :) 
Roca, one of the leading bathroom and sanitary ware brand created In-Tank Water Closet "WC", which was set to refashion the bathroom space. As part of Roca's idea to innovate, In-Tank Maridian toilet has been impressively devised using silent flushing and low-water consumption. 

To download a "Roca In-Tank WC" Pdf Brochure click here.