You will need:
Clean, empty mini pot
So first of all you need to make sure your sample pot is nice and clean, I clean mine out with a few drops of the Dr Bronner liquid soap and some warm water, and a little tooth brush to really get in all the joins of the tub and make sure there's no old, leftover product in there.
Now you want to put your sample sachets inside the tub, the way to get the most out of the sachet is to squeeze all the product away from the area that you're going to open the sachet. Then I just rip mine open, but you can use a pair of scissors to snip them open, and then squeeze all the product out into the pot...
Hope you liked this! I love picking up samples to try things out, and this helps me use up the awkward sachets they sometimes give you!
P.S. You can buy little pots like this from muji for less than £1, or I sometimes manage to pick them up for free with samples of products in origins and the bodyshop or mac (if you ask nicely they'll put some product that you want to try in a pot like this for you to take away, just use up the product they give you and clean the pot out like I mentioned above and you can keep reusing it)! You could also buy a pill box or something to that effect if you have lots of different small sample sachets, so you can decant them and keep them separated from each other, but keep them all in the same place at the same time! If you were going to do this, I'd recommend buying some small circular labels or something as well, so that you can keep track of what it is in the pots, and you can just keep sticking them over each other when you put new things in there!