People bringing a drink into Welsh Courts will have to take sips to prove it's not acid in a UK-wide crackdown on acid attacks.
The security clampdown is being enforced by the Ministry of Justice across Britain to reduce the risk of judges, jurors or witnesses being attacked with the substance.
Anyone entering court buildings with a drink, including lawyers, journalists and staff members will now be required to take a "sip test" to pass through security.
Cardiff Crown Court implemented the measure this week, but it was met with longer queues as security staff carried checks on unsealed bottles.
However, the Courts and Tribunals Service says it has been implemented as they take safety 'extremely seriously'.
"We take the safety and security of court users and staff extremely seriously, which is why we're bringing in enhanced safety measures across the court estate.