During the Meetup we discussed the spot spitter system of drip irrigation. Here is a link to the site where I ordered the tubing and spitters. It might actually be cheaper to get the main (1/2") tubing locally rather than pay the extra shipping. I was incorrect in the minimum tubing length but there is a price break for ordering the large roll (3 cents per foot vs. 7 cents per foot in the 100 foot roll) which could be split between 2 or more buyers. Note the punch tool is on this same page at the bottom.