It's a common word used for various types of bags, like:
* Shopping bag: "Dukan se thaila lo" (Get a bag from the shop)
* Carry bag: "Mujhe apna thaila de do" (Give me my bag)
* Handbag: "Usne apna thaila table par rakha" (She put her bag on the table)
* Sack: "Aanaaj ke liye thaila" (A sack for grain)
The word "thāilā" is derived from the Persian word "thail" which also means "bag."