I purchased a 5 tray Gusanito Wormswrangler vertical worm tower. The Can O Worms was another option I considered, but since we're just beginning to explore vermiculture the price of the vertical tower was little more appealing.
A thousand red worms (scientific name Eisenia Foetidas) weigh about 1 lb. and can compost up to 50 percent of their body weight each day. That equates to a little more than 3 lbs. per week. I'm not sure that Linda and I generate that much food waste each week, but the worm castings are very beneficial for gardening. Worm tea is also an excellent alternative to chemical fertilizers.
My pound of worms arrived today. Once they begin generating castings (compost) on a regular basis, I'll provide an update of my first venture into vermiculture.
Build your own continuous flow worm composting bin.