Drinking eight cups of water each day is a healthful habit both for humans and the goldfish they've swallowed during work initiations. Raise a glass to health with this Groupon.

$49 for Six Months of Water-Cooler Service for a Home or Office (a $280 Value)

Clients get a six-month water-cooler rental and four 5-gallon bottles of purified water each month for six months, plus waived bottle-deposit fees. Click here for Hall's Culligan's service area.

Hall's Culligan

Hall's Culligan's technicians work to perfect the taste and purity of water for residents of six states, going so far as to perform free water-analysis services to detect chemicals or impurities in clients' residences. Their water coolers keep homes and offices well hydrated, and water-purification systems target specific impurities such as lead or arsenic with 13 specialized filters. The company's reverse-osmosis system gets water cleaner and clearer than running it through a carbon filter or adding soap before drinking it, and its water-softening systems add the same crystalline cleanliness to laundry and hair. A coffee service also helps clients to reflect on their newly purified water with pensive cups of Green Mountain and Keurig coffees or specialty drinks such as apple cider or iced tea.