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Polycarbonate, Heys ($170), at heys.com.

Polycarbonate and polyurethane, Raden ($386), at raden.com.

Polycarbonate with built-in battery, Away ($345), at awaytravel.com.

Polycarbonate, Rimowa ($1,250), at rimowa.com.

Polycarbonate and ABS, Tumi ($675), at tumi.com.

Aluminum, Zero Halliburton ($1,385), at zerohalliburton.com.

Acrylic, Winners ($90), at winners.ca.

ABS, Atlantic ($300), at sears.ca.