Crest Sample Box, $5 + $5 credit for your next Crest or Oral-B purchase

While supplies last, if you buy a $5 Crest sample box from Amazon, you’ll get a $5 credit to spend on your next Crest or Oral-B purchase from the site. Even if Crest isn’t your usual brand, those sample sizes are perfect for traveling, so you should definitely get some use out of them.