Sorry for the late response man, I meant to link everything I used. So the gelcaps have been fine carrying them in my pocket in a pill bottle (small amounts, maybe 5-6) during 90deg heat for a couple of hours. I really just have the majority of them stored inside in a sealed container in a dark place and they might leak a very very small amount that is negligible. Hope that helps, below is the link to the caps I used.

https://www.amazon.com/gp/product/B01LYCIHL1/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1

I used 40.6 g of decent flower, 6 g of kief, and about 500mg of distillate from an old cart. The flower and kief were decarbed at 240deg Fahrenheit for 40 minutes covered in foil. I used 12 ounces of high quality MCT oil and 1 tablespoon of sunflower lecithin, then added everything to a crockpot on low for 4 hours stirring every 30 minutes or so. Each cap should be roughly 23mg of THC.

edit for links of everything I used https://www.amazon.com/gp/product/B01LYCIHL1/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1 (empty capsules used, they have been great so far) https://www.amazon.com/gp/product/B0781D9QYX/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1 (capsule filler that I literally only use to hold the capsules, would not buy again) https://www.amazon.com/gp/product/B078K8SVMN/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1 (syringes used to fill the caps)