The glass tube stem in New York city is sold in "bodegas" or "corner stores". It is illegal to sell a stem with a metal filter in these stores but many sell them anyway. However a loophole in the law allows these stores to sell glass pens which when the ink is removed becomes a "rosebud" or glass tube (stem), with a plastic flower inside the tube. Although there is only one reason why they are sold (to smoke crack) there is no law being broken by selling a stem in this way. If a person is caught by the police with a glass tube that has no metal filter and no "crack cocaine" residue in the stem, that person cannot be arrested or fined for having illegal drug paraphernalia on their person.