I'll tell you guys how I do it when I go cop, and I'm the typa fiend that HAS to get high in the car...I know it's bad, but shit, if I'm sick, I aintryna' wait till I get home!
I bring with me:
One bottle of drinking water unopened.
One rig.
One q-tip
One can of the Arizona Ice tea or whatever
I go buy my drugs, which now a days comes in corner bags. I have the dope in my mouth and the water bottle with me the whole time...
If shit goes down at any time during the transaction, coming in and out of the spot, driving away, I take a swig off the water bottle and puke the dope up later. As long as there's no holes in the bag, it will stay dry %99 percent of the time....
I drive with the with the dope in my mouth out of the spot and find a safe place to shoot up, or at least, the safest I can find!
With the dope still in my mouth, I draw up however many units out of the water bottle first, make a cotton out of the q-tip, with the dope still in my mouth!
I quickly take the bag of dope out of my mouth, open it and dump however much in the cooker...
after I dump it in the cooker I quickly twist the bag of dope shut really well and tuck it between my cheek and my gums(the rest of the dope will stay good as long as you don't drool)
quickly mix the dope in water bottle cap, throw the cotton in and draw it up, then shoot....
I watch the whole time to see if any cops are coming and if they do come, I pull out the cotton, swallow the dope in my mouth and the cotton, recap the bottle and shake it so there's no evidence that I was using it as a cooker....you can't see the dope in the water with naked eye as long as you dump the shot on the floor before recapping the water and shaking...all thats left is the needle you drew up with....which they usually won't bust you with where I'm from
If the cops don't come, all thats left is the cotton, the rig and the dope in my mouth....
I take the rig and break it with the cap still on the point, if you jam the rig down hard cap first, the needle will get stuck in the cap where you can't get it out, I take the rest of the the broken rig and the cap, put it in the Arizona can, crimp the top so nothing casn come out and throw it away if I'm near a trash can...
Now all thats left is the water bottle, with nothing in the cap anymore and the rest of the bag of dope and the cotton still in my mouth, which I can swallow at anytime if I have too....
It's all about being fast and doing every step with the equipment before you break out the dope, and then being able to conceal everything quickly....Even if I do see the cops coming when I'm mixing the shot, I can usually have everything concealed by the time they get to me...If they find the empty rig, they usually let me go..