I'd recommend against using yeast in glass, especially if you're going to give as gifts. You never know when they're going to drink it, or how they're going to store it. And if you tell them to refrigerate it or it will be a grenade, then they may be afraid of it.
Bottle in plastic if you use yeast, but it still needs refrigerated when it's carbonated and even then it has very limited shelf life.
I bottle mine in glass from the keg, which works beautifully if you do it right. I'd suggest going the easy route and mixing syrup with club soda, or buy a sodastream. I'm not much a fan of the sodastream because it's pricier in the log run than kegging, but my brother-in-law loves his.