Girls on the go need to pack light, a theory that designer Ela Kowalewska obviously espouses. A former handbag creator at Roots, Kowalewska takes a woman's mobile essentials into consideration in her own line of clever clutches, called Ela. The M.I.L.C.K. leather envelope, for instance, is small, streamlined and chic, yet roomy enough, as its name spells out, for money, identification, lipstick, cellphone and keys. And hey, if you happen to forget something, you've got the cash en poche to buy it.