Growing houseplants in water

Last spring I noticed some nice arrowhead plants (Syngonium Podophyllum) growing wild in the neighborhood (one of the benefits of living in Florida). I snipped a few cuttings, perhaps 8 in/20 cm each, and brought them home.

I then took 

• a 30.5 oz left-over plastic Folgers ground coffee can, 
• cut a round hole (1 in/2.5 cm) in the center of the lid, 
• filled the can with tap water, 
• added 1/4 tsp/1.25 ml of the liquid 2-1-6 hydroponic fertilizer that I use weekly with all my houseplants,
• inserted the bottom of the cuttings through the hole,
• snapped the lid onto the can,
• and placed the plastic can in a decorative pot near a window with lots of indirect light.

This is what it looks like now. 

I haven't changed out the water but I do add water containing the fertilizer mix each week. Because the lid is snapped onto the can evaporation is low. 

This is an inexpensive way to acquire and grow houseplants. And I never have to worry about soil gnats. I have four plant containers at home and six in the office all supporting a mixture of low light tropical houseplants in water.