A Tesco spokesman said:
This product was uploaded to the website by a third party seller but was removed from sale immediately because we found it offensive.
The webpage should have been removed at that time and we are looking into why it is still visible two months later.
We have very clear guidelines for third party sellers who list items on our website, and are very sorry that on this occasion they weren't followed.
More top news
Thousands of people have lined the banks of the Mersey to see Cunard's three flagship ocean liners sail down the river.
Claims that surgeons used an old saw found in a cupboard to amputate a patient's leg are being investigated.
A woman who has battled anorexia for more than a decade has released a heartbreaking video pleading for help in fighting the disease.