To begin with, i got the idea from http://www.instructables.com/id/Pocket-Full-of-Anything---evenToothpaste/
---- Yes, I keep these in my wallet in case i need them :D, and I go to school.... How do I survive? I use these! I usually carry 3 if I'm in school , i take em out, violently try to rip it open and squeeze the goods into my mouth, then rinse out in the bathroom. :D
Step 1: Tools and Stuff
This is extremely simple and wont cost you anything.
Plastic Ziploc Bag (has to be plastic!-thin)
2Flat surfaces (i used small plexi- glass boards)
Step 2: Cutting...
Now cut a square from the plastic bag, I wanted squares so i cut 1. Start at the corners, they are less work = easier to finish up later. :)
Step 3: Closing :D
Now use the 2 flat sides you have to close the open sides. Leaving 1 side open to fill the mini bag. I used my Plexi - glass boards here REMEMBER THE VENTILATION!. The pictures will help you understand more than the pictures. :)
1-Place the cut plastic on top of one of the peices of plastic, put the other ontop leaving 1 open side peeking out so u can melt it off.
2-Heat the soldering iron up then cut the plastic thats sticking out straight through (straight line accross) the hotter the faster and cleaner.
Step 4: Filling and Finishing up :D
Now stick the toothpaste head into the plastic bag and fill it, I use less than a pea-sized portion, also depends on the bag size , NEVER make the bag full, you will squeeze it if it's in your pocket and burst , you don't want that :D
AFTER filling try to move the paste as far away from the opening, put it under the surfaces and seal it , I recommend you not use the hole you used to fill as the side you use later:D