Some studies have shown nail brushes to be effective, but we know it isn't convenient to carry one around.

WSJ: Hand-Washing Techniques for Good Health

Less convenient to carry than a metered dose inhaler without a spacer.

CNN: Asthma inhalers: Which one's right for you?

Small and convenient to carry.

CNN: Asthma inhalers: Which one's right for you?

It will be convenient not to have to ask for and carry any more paper receipts or physical discount vouchers, because they will be emailed to our mobile phones and personal computers.

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