I use Heartlandvapes nicotine, VG,PG, flavors and bottles. I've been to there place here in Oklahoma City and liked that they run a nice clean modern lab. I had gotten premade juice in my early days of vapping from B&M and noticed when I started using Heartlandvapes that my juice was smother. The best thing Heartland offered was there sample packs. I think the bottles and prices are higher now then when I bought but you get 50 misc. bottles for a $100. I was able to find out what I really liked before buying bigger bottles. It may be cheaper to just buy big bottles of good stuff, but I like DIY so I can fine tune and experiment and I've gently lowered my Nicotine down to 0mg and vape just for the flavor and something to keep my hands busy.