"They're angry in their quiet Nepalese way," he said.
"We're extremely surprised someone would do this."
They had noticed the bucket was missing about 1pm and on reviewing the security footage saw a woman picking it up and walking out with it earlier in the day.
The bucket had only $10 or $15 in it but it was the intention that really upset them, Mr Herbert said.
"It's not the crime of the century but it's a disgusting thing to do.
"The Nepalese guys are walking around in a bit of a daze after it all.
"I had to calm them down a bit."
He hoped the woman would not be using the "Nepal Earthquake Fund" labelled bucket to collect money for herself and warned people to be aware of her.
Police confirmed they are investigating.
Anyone with information is asked to contact the Tauranga Police on (07) 577 4300.
Alternatively, information can be provided anonymously via Crimestoppers on 0800 555 111.