Bottled water coolers are extremely economical and start from as little as £1.50 per week on a 3-5 year lease. Though bear in mind you will need to purchase bottled water refills, which start at around £7 per bottle depending on the size (11 litres or 19 litres) and the type of water (spring, mineral or botted). The number of bottles you’ll get through really depends on your staff numbers.Plumbed in water coolers for the office are only slightly more expensive, starting from £2.00 per week on a 3-5 year lease, though you don’t have to pay for bottled refills.Hot and cold water dispenser taps for the office are the most premium option starting from £6 per week on a 3-5 year lease.