Kratom caps is a really, really great idea. The taste of kratom is so damn bitter! Capping the herb will eliminate that problem, and would also be far more convenient for dosing. A really good idea; I'm gonna use it. Also, buying commercially prepared captured is grossly over-priced; you pay a huge mark-up for the gelatin capsules imo; the kratom inside is usually standard quality.
You only need to buy vaccum sealing bags used for storing ingredients, and they're very cheap. Right now, I'm keeping my kratom in a snaplock bag wrapped tightly in cellophane, and storing it in the vegetable crisper in my fridge. Do you think moisture could be a problem here? (The kratom is 2 months old btw).
I've a very simple idea to make a kratom extract. It involves putting the kratom in cold or warm water (I've heard boiling water can harm some alkoloids), blitzing it in a blender to ensure it dissolves properly, then pouring the liquid into a baking tray, and then using a fan to evaporate the water, hopefully leaving me with a hard resin. I'm trying a small sample batch using around 30 grams or so. Does this sound do-able to you? If not, do you know any decent extracing procedures that are really simple and cost-efficient, by any chance?