I will second the advice about being careful of umbellifers. Several are seriously toxic as well. I purchased a length of metal tubing from a diy store and sawed it into two lengths. A short piece about the length of a wooden spoon for fitting into my mess kit, and a longer one for group camps where folk are sat around a larger fire (the extra length allows you to avoid having to get too close). A blow poker can be put right into a fire to direct the air exactly where you want it, and there is always a gap in the pack big enough to put one.
One tip is to take a short length of rubber tubing, perhaps 2 inches long, and fit it onto the end of your blow poker. This gives a better mouth feel, and allows for more controlled blowing, but also gives you a 'fire end' and a 'mouth end', thereby avoiding the problem of picking up a metal blow poker and putting the hot end in your mouth (been there, done that, tongue and lips now healed

).