When Brooklyn design duo Chen Chen and Kai Williams — known for their eccentric experimentation with materials — headed to Brazil two years ago for a residency with the gallery Coletivo Amor de Madre, they learned an important lesson the hard way: Don’t show up in a far-flung country expecting to source all your fabrication supplies at the drop of a hat. Invited to join the same gallery last month for an interactive installation at Design Days Dubai, they brought from home many of the materials they needed to make their new Moonmilk vessels (above), which they constructed live in their show booth from pigmented quick-dry cement slowly dripped onto a substrate. They also left time before the show began to scout working-class areas where, says Chen, “instead of big box stores like Home Depot, you’ll see an entire neighborhood in which one shop only sells plastic and another shop is a carpenter inside this little storefront, where you can say ‘I need pieces of wood cut to this size,’ and he’ll cut it for you.” The rest of their eight-day trip was spent making — and exploring.