Amazon’s Subscribe & Save feature is useful when there’s something that you want to buy online and know that you’ll need regular shipments of, like electric toothbrush heads or bags of freeze-dried marshmallows. There’s a catch, though: if you have Amazon Prime and want free two-day shipping on those mailing labels or novelty emery boards, selecting the Subscribe & Save option from the item page doesn’t get you two-day shipping by default. [More]
