We love the elegant design of the glass vessel that is the Soma carafe ($49, drinksoma.com), which uses biodegradable filters that incorporate materials such as coconut shells and silk. The sturdy, German-engineered container fits in most refrigerators and holds more than 40 ounces of water. Filters are replaced about every two months through a subscription program. The product is dishwasher-safe, and the hourglass shape has a beveled edge that eliminates drips. The system was created by a San Francisco entrepreneur, a filtration expert for several major coffee-brewing companies and a design team.