As one of its daily deals, Groupon offers the RFID Identity Theft Protection Credit Card Sleeve 10-Pack for $5 plus $3.99 for shipping. That's $11 under the best price we could find for a similar 10-pack elsewhere.

Groupon also has a Passport Protection Sleeve 5-Pack for $5 plus $3.99 for shipping. That's $3 less than the best price we could find for four similar sleeves elsewhere. Both deals end today.