:d
There are actually a few threads on this topic, any method works.
My personal preference is the following method, as it can be done in minutes; freebasing enough for a few uses.
You dissolve 500mg in a minimal amount of water, (10mL) and add a few drops of concentrated NaOH or NaCO3 solution. Then add a solvent of your choice, flip the tube upsidedown a few times to mix, and then pipette it off.
I like to use a tall thin glass, like a test tube, but a shot glass will work fine. And for the solvent I use DCM (only 5mLs or so). DPT is most soluble in it, and it sinks to the bottom of the glass. So I can easily suck up the bottom layer with a glass pipette into an evaporating dish, in a few hours you have a nice oil.