The Green Party leader has faced down a scolding in the Dáil after bringing a bag of household rubbish into the house.
Deputy Ryan dumped the rubbish out on to his desk this afternoon in an effort to highlight the huge amount of unrecyclable material shops and manufacturers provide to customers.
He called on the government to introduce new restrictions on excessive packaging and a ban on unrecyclable take-away coffee cups.
"We are drowning in plastic," he told the house as Ceann Comhairle Seán Ó Fearghaíl berated him for "advertising."
Displaying the everyday unrecyclable rubbish, he called on the government to take action:
Deputy Ryan called for cross-party support for a number measures to tackle waste - including the introduction of a plastic bottle deposit scheme.
The scheme would see 10c returned on every bottle - a system which deputy Ryan said had resulted in a 90% increase in recycling in other jurisdictions.
"It is a win-win scenario for the householder, who would be getting money back," he said.
"Everybody would be buying into what would be a step in the right direction in the management of recycling."
He warned that there is 150 million tonnes of plastic in our seas - and said the deposit scheme would prevent 2.5 million bottles a year going into landfill.
The Green Party leader's intervention comes following a deal between the government and Fianna Fáil which will see the introduction of the new bin-charges system - with a pricing watchdog to examine consumer costs.
The Taoiseach Leo Varadkar said the government is open to any idea that may reduce waste adding that he is committed to anything that makes it "easier for people to do the right thing or make the right choices" in terms of the environment.