We don't care for alcohol tinctures, but instead make tinctures ( I call it a tincture, you call it what you want, lol) using concentrates and organic hemp oil.(amazon) We store in eye dropper bottles. IDK the shelf life but I have one that's over a year old and still is good to use. The hemp oil stays liquid so it's easy to get an eye dropper of it. One eye dropper = one dose.
2 grams rosin (or another concentrate), 1/2 tsp of sunflower lecithin, one fluid ounce of organic hemp oil. Heat the oil with gentle heat, add the powdered lecithin and stir until clear, then add the rosin and stir again until clear. Then just fill the eye dropper bottle. You can adjust the amounts and it's good to remember some concentrates are stronger than others.
It can be used on food or just under the tongue. Under the tongue or in a hot drink helps to make it act quicker.
Ive just went through a rough patch with my asthma and used these and canna caps exclusively for over 3 weeks. Even now I still use tinctures to lessen my vaping and give my lungs a rest.