Department of Trade and Industry Undersecretary for consumer protection group Ruth Castelo checks the prices of basic necessities and prime commodities in the Diskwento Caravan in Barangay San Roque, Marikina City. Diskwento Caravan is a DTI initiative that aims to provide reasonably-priced quality products to the consuming public. The program is in partnership with the manufacturers and distributors of basic necessities and prime commodities, and the local government units.