Put this on your "how to lose a weekend" list: Nature's Medicines' Nature’s Vapes Live Resin Pen cartridges, indica strain. No muss, no fuss — screw the cartridge into a vape-pen battery and inhale. Best of all, no singed fingertips, because unlike dabbing concentrates like crumble or wax, which is like trying to learn glass-blowing, a vape pen is probably not going to hurt you. This oil product set us back $40 for a half-gram, 350-milligram cartridge. The box said the indica strain is derived from the company's AMF OG strain, which is a cross between Obama Kush and Skywalker OG. AMF stands for "adios, motherfucker." The concentrated oil version provides a solid, heady sensation that settles into a cloud-like body high. Nature's Medicines promotes the liquid resin as pure cannabis oil — that is, it contains no additives that didn't spring from cannabis plants, and is about 70 percent THC. The natural terpene flavors make for a mighty tasty buzz. It's a good choice for concentrates connoisseurs and weekend vapers alike.