I'm going to talk a little about the Crest 3D White Whitestrips Professional Effects and my experience with them.
What the website says:

Product Description:

Crest 3D White Professional Effects Whitestrips provide professional level whitening results that last up to 12 months. Featuring Advanced Seal technology, these no-slip Whitestrips allow you to talk, drink water and go about your day while you whiten with no sticky mess. Use for 30 minutes, once a day for a stand out smile. Plus, you'll start seeing results after just 3 days.

• Professional level whitening results that last up to 12 months.
• Advanced Seal technology allows you to talk, drink water, and go about your day while you whiten and the Whitestrips won't slip.
• Start seeing a whiter smile after just 3 days.
• Enamel safe. Same whitening ingredient dentists use.
• Give yourself a smile makeover with professional level whitening results at home.
• Easy application. Safe and easy to use.

Product Ingredients :

PVP, PEG-8, Water, Hydrogen Peroxide, Acrylates Copolymer, Sodium Hydroxide, Sodium Saccharin

My Thoughts:  I'll definitely pick these up again if I need to whiten my teeth again later on down the road (I love my coffee), after just the first couple uses I could tell my teeth were getting whiter.  For the treatment these give it's definitely way more affordable then shelling out $400+ to a dentist. 

Price: $49.99 for 20ct

Where to buy: P&G eStore

You can check out this great deal at the P&G eStore:

15% off on a first-time order from a new customer, using promo code: A9Z-MN5-KY3-ISA

Free Shipping on orders over $25

Free Samples with every order.