Based on the facts you have presented, you face no criminal liability under Indian law. Here is the legal analysis:
1. No Offence of Abetment is Made Out
Under Section 107 of the Bharatiya Nyaya Sanhita (BNS), 2023 (formerly Section 107 of the IPC), abetment requires intentional instigation, conspiracy, or aiding of an offence. Your explicit instruction was to purchase a cold drink, and you specifically requested him not to buy hookah. This negates any mens rea (guilty intention) on your part. The fact that the staff member used the money for an unauthorised purpose constitutes his independent act, for which you bear no responsibility. In Mohd. Abdul Arif v. State of Telangana, the court held that mere presence or passive association without intent does not constitute abetment.
2. Hookah is Not Per Se Illegal Under Central Law
The Narcotic Drugs and Psychotropic Substances Act, 1985 does not regulate hookah or tobacco. Regulation of hookah falls under the Cigarettes and Other Tobacco Products Act (COTPA), 2003, which primarily governs sale, advertisement, and public smoking, not individual possession or consumption. The Bombay High Court has clarified that only tobacco-based hookah is regulated, while herbal/tobacco-free hookah is lawful. Even if the hookah purchased contained tobacco, the penal provisions under COTPA target commercial establishments (owners/managers) serving hookah, not individual consumers or casual purchasers.
3. Your Money Was Refunded, Severing Any Connection
The staff member refunded your ₹40, meaning your funds were not ultimately used for the hookah purchase. This further eliminates any possible nexus between your money and the act.
4. No Future Legal Trap
For the reasons stated above—absence of mens rea, lack of abetment, the refund, and the fact that hookah consumption is not a criminal offence under Indian law—you have no exposure to any criminal proceedings, now or in the future.