In 20 years, luxury spa brand Elemis has sprung from a small British spa to skincare powerhouse that treats nearly six million people each year, thanks to a global network of 1200 retail locations and spas -- by land and by sea, as the brand is popular on cruise ships. As such, Elemis has developed a worldwide following of loyal consumers addicted to their botanical-based anti-aging skin and body care.

To celebrate their 20th anniversary, Elemis is giving back in two ways: By creating limited edition products for value prices, and by donating a portion of the proceeds to worthy charities. Here are a few of our favorite offerings:

Limited Edition Skin Nourishing Milk Bath: This milk bath was Elemis' very first product, and it's still one of their top sellers today. Clinton Hardesty, the head of Education for Elemis, says the milk bath is great for alleviating eczema, psoriasis, and can even help prevent stretch marks. Purchase a big 500ml size that comes in a crystal decanter for $82, and $1.60 from every sale will be donated to Mothers4Children, an organization that provides funding to children's charities worldwide.

Supersized Pro-Collagen Marine Cream: People go nuts for the skin-plumping, wrinkle-softening powers of Elemis' signature anti-aging cream. Elemis grows their own seaweed off the coast of Malta, which is only harvested at the peak of activity. With this jumbo 100ml size you're getting twice the amount of the regular jar but only paying 25% more at $185.

Lime & Ginger Travel Duo: Coming up in April, to honor Earth Day, Elemis is donating all net proceeds from the sale of their delicious mini-sized Lime & Ginger Hand and Body Lotion and Lime & Ginger Hand and Body Wash to CARE Climate Change Innovation Fund. The initiative supports on-the-ground programming to support communities effected by climate change. Look for the duo in April at timetospa.com/elemis.

In addition to all that, the brand just launched the new Pro-Radiance Cream Cleanser, which Hardesty says "takes the cleansing process beyond the norm. It effects the skin on a cellular level." That means in addition to washing away makeup, oil and the daily grime, the cleanser also delivers a whole slew of potent natural ingredients (such as acai, moringa seed peptides and great burdock) to detoxify deep under the skin.

Whew! There's plenty more where that came from, so if you're an Elemis fan, now's the time to stock up. All the products are available at Bergdorf Goodman (except for the Lime & Ginger duo) and timetospa.com/elemis.