Hey Dupree I usually mix up my concoction of TC-W3 and Chevron Techron Fuel system cleaner in advance. I take an Empty MMO bottle and mix one pint of each together, (Chevron Techron and TC-W3). I refill the empty 6 ounce Gumout/Regane Concentrate bottles with the mix. 6 OZ in each bottle....I have about 10 empty bottles so it takes more than 1 batch of the concoction.
I store these "Premade Bottles" in a Empty Folgers Extra Large Size Coffee Container from Costco. The bottles stand up-right and fit fine with the lid. I have a Toyota 4 Runner so I've got a box with some auto supplies in the rear end of the truck and the Container with the mix fits in upright and secure.You need to have a lid on the container since the "aroma" of the TC-W-3 has a way of hanging around. Any container will do for storing the bottles....Tupperware etc...just make sure that the bottles will stand upright and the lid will fit secure.
Before each fill-up of 12 to 14 gallons of gasoline, I take one of the bottles out of the container and add the entire 6 OZ to the fuel tank before filling up.
After the fill-up, I put the empty bottle back, with the cap attached, into the Folgers container and snap the lid shut. These bottles can be reused over and over again. When I'm down to 2 bottles remaining in the inventory of the Folgers container, I simply refill the bottles again with the same procedure from the empty MMO quart bottle.
I hope that this will help you guys out. If you have a trunk on your vehicle you can do the same with a box for storage.
I take this Folgers Coffee container with me with the filled bottles when I'm making a long trip to Florida or down south for a vacation. I've got enough to handle all the fill ups going down and coming back home with plenty of extra if I should ever need it.