I happened to get this "milk chocolate-ish" color but after visiting a few Daiso stores here, I believe the glue sticks also come in dark brown, pink and white. Do note that the glue sticks are to be used with the small hot glue gun.
I actually got the idea of using the glue sticks with a mold from AtelierLorien, another channel by Abi from StudioLorien. Here are my materials and tools:
A chocolate mold from Daiso, my own molds, my ugly small hot glue gun, and a piece of paper
And so, I loaded my glue gun with the chocolate glue stick and let it sit for a while until the melted glue could flow smoothly onto the piece of paper. Then, I started to fill some of the shapes in the Daiso chocolate mold.
The process can be kinda fiddly since glue is, well, sticky. I would suggest placing the tip of the glue gun within the mold cavity while squeezing the glue out. Once the cavity is filled, tap the mold to level the melted glue. Once the glue cooled and hardened, I removed the pieces out from the mold.
And here are a couple of pieces from my own molds.
Chocolate floral cabochon..
Chocolate bar with a bite off..