Dutch designers Waarmakers have created sustainable rubbish sacks for discarding unwanted items in good condition, in the hope that they'll be picked up by a new owner instead of ending up at a landfill site. More about Goedzak by Waarmakers
News: Zaha Hadid's planned extension to a centre for studying Middle-Eastern culture at the University of Oxford is set to begin construction later this month (+ slideshow). More about Zaha Hadid's Oxford college project to start on site
A gigantic yellow giraffe pokes its heads out from the roof of this nursery and childcare centre in Paris by French studio Hondelatte Laporte Architectes (+ slideshow). More about Giraffe Childcare Centre by Hondelatte Laporte Architectes
Product news: London designer Benjamin Hubert will launch a ceramic lamp for French brand Ligne Roset at Maison&Objet in Paris and imm cologne in Germany next week. More about Container lamp by Benjamin Hubert for Ligne Roset
The Barcelona Pavilion filled with junk from its basement (above), a vibrating fork and an A-Z of architects all feature in this week's Dezeen Mail, which also includes the latest news, jobs, competitions and reader comments from Dezeen.
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News: in 2012 the total number of skyscrapers constructed around the world failed to increase for the first time in six years, says the annual report from the Council on Tall Buildings and Urban Habitat, revealing the continued impact of the global financial crisis that started in 2007. More about Skyscraper construction stalled in 2012
White walls are sandwiched between the exposed concrete ceiling and floor of this minimal hair salon in Kobe by Japanese designers Sides Core (+ slideshow). More about Jeté hair salon by Sides Core
Product news: the Pebble smartwatch, the project that raised the most money ever on crowd-funding platform Kickstarter, has gone into mass production and is set to begin shipping on 23 January. More about Kickstarter record-breaking Pebble smartwatch goes into production
Royal College of Art student Gabriele Meldaikyte has designed a set of interactive exhibits for a museum of iPhone gestures (+ slideshow). More about Multi-Touch Gestures by Gabriele Meldaikyte
A wall of digital animals that distract children on their way to surgery is one of the interactive installations presented by designer Jason Bruges in this movie we filmed at our Designed in Hackney Day. More about "The pieces wouldn't be anything without the people who interact with them" – Jason Bruges
Product news: colourful LED torches shaped like the handlebar grips of BMX bicycles by British designer Alexander Taylor have gone into production with Hong Kong brand Praxis. More about Grip Torch by Alexander Taylor for Praxis
Israeli studio Paritzki & Liani Architects has squeezed a house with an exposed brickwork interior into the space between two existing properties in Tel Aviv (+ slideshow). More about ZBL House by Paritzki & Liani Architects
This doctor's surgery in the Austrian Alps by Graz-based architects Hammerschmid Pachl Seebacher was inspired by small wooden hay barns that dot the local landscape (+ slideshow). More about Medical Practice in Ramsau by Hammerschmid Pachl Seebacher Architekten
This animation by architect Andrea Stinga and graphic designer Federico Gonzalez depicts the best-known buildings of 26 famous architects, one for each letter of the alphabet. More about The ABC of Architects by Andrea Stinga and Federico Gonzalez
A collection of original costumes, set designs, photographs, instruments and other objects from David Bowie's personal archive will go on show at the V&A museum in London this March, coinciding with the release of the pop star's first album and single in a decade. More about David Bowie is at the V&A
Dezeen promotion: creators of the Philips LightCollector app, which stores and shares users' pictures of their lighting design inspiration, have selected some of their favourite images uploaded since its launch in November. More about Highlights from the Philips and Light Collective LightCollector App
Karina Wiciak of Polish design studio Wamhouse imagines paper chairs and chandeliers suspended on meat hooks in this fantasy interior inspired by a slaughterhouse (+ slideshow). More about Ubojnia by Karina Wiciak
Cologne 2013: these chairs with metal frames wrapped in continuous cords by Israeli designer Rami Tareef have gone into production with Israeli design brand Gaga & Design. More about COD by Rami Tareef for Gaga & Design
These shots by photographer Edmund Sumner show some of the first visitors able to scale the roof of the O2 Arena in London, thanks to a new fabric walkway designed by architects Rogers Stirk Harbour + Partners and Bblur Architecture (+ slideshow). More about Up at the O2 by Rogers Stirk Harbour + Partners and Bblur Architecture
The angled columns of an earthquake-proof structure frame a series of window slits on the exterior of this Tokyo research laboratory by KINO Architects (+ slideshow). More about Spiralab by KINO Architects