Artist creates sketches on leftover bottle caps  
Portugal-based artist Sílvia Franco Santos creates sketches using the scratchboard technique on leftover bottle caps, as part of her 'One Less Cap In Trash' initiative. Santos would use caps as containers to mix inks while teaching art, which is when she came up with this idea. The caps, priced at an average of ₹1980 ($29), are available on online stores.