A grandmother was disgusted to find maggot-like insects in a glass of Capri-Sun which she gave to her four-year-old grandson.

Julie Holroyd opened a pouch of the tropical juice drink for the youngster, but he said it tasted 'funny' and refused to finish it.

The 56-year-old poured the contents into a glass, and was horrified to discover there were two small insects swimming inside the Capri-Sun.

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Horror: Julie Holroyd was disgusted to find insects in a pouch of Capri-Sun tropical drink

Now Coca-Cola, which distributes the brand in the UK, has vowed to investigate the incident.

Mrs Holroyd was looking after her four-year-old grandson and his younger brother at her home in Golcar, West Yorkshire.

'He came in and said he was thirsty so I went to get a drink,' she said. 'I had bought the drinks at Sainsbury's and I got one out of the fridge.

'I opened the pouch for him but he took only a little drink and said, "I don't want this, it tastes funny."

'Normally I would have said to him not to be silly and to finish it but I remembered I had read something a few weeks ago about Capri-Sun.'

Contaminated: Coca-Cola have vowed to investigate how the insects ended up inside the pouch

Disgust: Mrs Holroyd has spoken of her horror at finding the small creatures, which were almost drunk by her four-year-old grandson

A number of Capri-Sun customers have reported finding mould in the pouches in recent years.

'I took the drink off him and poured it into a glass and spotted the insects,' Mrs Holroyd continued. 'They are tiny but they are clearly insects.

'One stuck to the side of the glass and the other was floating in the drink. I dread to think what could have happened if he had drunk it.'

Coca-Cola have told Mrs Holroyd to send in a sample with the pouch and the insects so that they can investigate fully.

Last year, Capri-Sun was forced to introduce new packaging with a clear window to allow consumers to check that the drink is not contaminated.