Actually besides the powder I did buy one premixed eti/PG solution that comes in a vial with an eye dropper. I'll see how that works out, and if it works out well then perhaps I will buy some empty ones to use for my own powder/PG solution. (Buying the powder is a lot cheaper).
I wasn't going to use water since etizolam isn't water soluble, I was going to use the eti dissolved in propylene glycol. If I make a solution of 2.5mg/ml, then I would only be injecting 0.4ml of fluid into the capsule to make a 1mg capsule, and was thinking of perhaps filling the rest of the capsule up with something like baking soda, so it wouldn't exactly be filled to the brim with liquid. (Although I do have capsules that are filled with liquid that seem to hold up fine. I have an herbal passionflower supplement that consists of capsules filled with dark liquid). Btw I use vegetarian capsules, not gelatin capsules, cause gel caps tend to warp and have a high fail rate with my capsule maker. I wouldn't worry too much about mold since I would probably be using them pretty quickly. My cheap little capsule maker can only make 24 capsules at a time, taking about 10 minutes, combined with the tediousness of injecting them with eti/PG solution I'd probably be making them as needed.
I carry around capsules filled with phenibut in my bag with me everywhere I go and I've never had an issue with cops, I generally stay out of trouble and cops have never had any reason to search me or my bag. Even harmless supplements things like Taurine and NAC come in capsules filled with white powder so I don't think it would be issue.
But yeah the idea of having to go to the bathroom and use a syringe to take a drug just seemed a little too sketchy for me even though it's a legal substance being used for a medical purpose, which is why I was trying to find an alternate method to make this powder into portable doses. But if it turns out to be the only way I can reasonable use eti on the go I'll just have to deal with it.
I got kicked out of a bar once accused of using drugs and was escorted away from the bar by cops. Between benzos and 2 beers I was a bit out of it and clearly appeared intoxicated or drugged, but the cops never searched me or asked about it, maybe its white privilege at work with the NYPD... but if they did I always carry around my legally prescribed bottle of clonazepam that would 'explain' things if I seem intoxicated or drugged up.
Anyway eti after all is called a research chemical, I have a lot of powder coming so I may as well experiment with different ideas, thanks for the tips thus far.