Nisa has reported better-than-expected results from upselling units introduced this year.
The symbol group said there had been a 79% increase in volumes since their launch in April.
Nisa retailer Jet Sunner said his sell rate of the products on the units was 500%.
“I think this initiative is a fantastic way of boosting sales for any store of any size,” he said. “I am really pleased with how successful it has been so far.”