Emma McGinlay offered little Ella a cup of apple and blackcurrant squash - but, after just a few sips, the toddler became very sick.
"It said there were lots of foreign bodies in it and it was making people sick"
She told the Daily Record: "She was drinking it but kept spitting it out.
"Then she started refusing anything I was giving her. She didn’t seem herself at all.”
Ella began being violently sick and became very lethargic.
Emma continued: “I was really worried about her. She was really lethargic. She couldn’t really sit up and then she started to have diarrhoea as well.
"I went across to the pharmacy and she was prescribed Dioralyte but she wouldn’t even take that. I was racking my brain thinking about what she had eaten.”
After logging onto Facebook, the worried mum found the cause of her daughter's sickness.
She explained: “I am on a mums’ forum and it came up saying there had been a warning for this apple and blackcurrant juice.
"It said there were lots of foreign bodies in it and it was making people sick.
“I checked my bottle and smelled it. It smelled like sewage. Neither my husband nor I had noticed it at the time because we give her so little of it but it was disgusting.”
Ella, who struggled to eat and drink after her illness, is now feeling much better.
Emma was not the only person to complain about the contaminated drink; Twitter has been flooded with messages from concerned shopper.
Responding to complaints on Twitter, Tesco confirmed it had recalled the product. It is no longer available to buy on its online shop.
"We have withdrawn the product from sale. Only products bought since the New Year may be affected, they will have a best before date of October 2015," the spokesperson added.
"Any customers can return this product, open or unopened, to any Tesco store."
Despite this, the product is not currently listed on the supermarket's recall page of its website.