In Texas, you MUST keep and carry any prescription drug in the original container from the pharmacy. Article 483.041 of the Texas Health and Safety Code provides that it is unlawful to possess a dangerous drug unless it has been “obtain[ed] from a pharmacist acting in the manner described by 483.042(a)(1),” which requires that the drug be dispensed in a container with a label on it (which in most cases will be a prescription bottle). If you have it on you (or in your pocket or purse) or you transfer it to another container, this is contrary to what Texas law provides. If you are traveling anywher, always keep your prescription in the original container from the pharmacy.