This is a fantastic deal!
In the 1/15/12 Smart Source Insert there should be (or is depending on when you read this) a coupon for $4 off any Brita Pour Through Pitcher.
Plus there is a $10 rebate form  right now for this product (which in most stores are found over by the home goods stuff).
So here is how the deal works:
Brita Pitcher: around $8.97 (this is the approximate price at Walmart. You can check Target and other stores for the same product.)
$4/1 Brita Pitcher or Faucet Mount System, exp. 3/31/12 (SS 01/15/12)
Store Total: $4.97
Then print your $10 Rebate HERE , exp. 3/31/12
Final Total: $5.03 MONEY MAKER!!
Also if you are familiar with how CVS and Walgreens work they both have great deals this week as well on this product.
I do have one piece of advice for you- if you REALLY want to make the $5.03 in profit I would be some additional items on your order. Most of the time you receive the full rebate- regardless of coupon usage- but if they got your receipt and your final total was lower than the $10 of the rebate they may not process. Just my two cents.
Thanks I Heart The Mart !