The Irish Penal Reform Trust is calling the practice concerning.
37 inmates in Portlaoise are currently 'slopping out'.
A total of 58 prisoners are currently engaging in the process in jails across the country with Limerick prison having the second highest figure at 21.
But the Irish Prison Service says they all have single cells.
However, Fíona Ní Chinnéide, from the Irish Penal Reform Trust, says it's still a concern - especially in the current climate:
Midlands Gardaí Appeal For Witnesses To Fatal Crash
Two people died in the collision.
Midlands Security & Defence Analyst Says Hoax Bomb Threats Aimed To Intimidate
Newstalk, Today FM and RTÉ were sent the false alerts by email yesterday.
Almost €446,000 Allocated To Midlands Community Centres And Clubhouses
Ballinahown Community Hall received the highest amount in Westmeath.
Two People Killed In Offaly Following Fatal Crash
One person has been killed in the collision.
Midlands Family Takes On Ireland’s Fittest Family Challenge
The series continues this weekend.
5K Fundraiser To Support Motor Neurone Disease Association Takes Place In Westmeath
The event is taking place tomorrow.
No Slowing Down With Age As Westmeath Bowlers Shine At 14th Annual National Bowls Competition
Woman Appears In Court Over €280k Cannabis Seizure In Midlands
20kg of cannabis was discovered in the vehicle on the M7 in Portlaoise.
