glastonbury festival bans single-use plastic bottle sales
An announcement on the festival's website said the containers would not be supplied backstage, nor to catering or production staff.
Festivalgoers have also been encouraged to carry "as little single-use plastic as possible".
Organizer Emily Eavis encouraged ticket-holders to bring reusable bottles and said "hundreds of free water taps" would be available.
A Glastonbury spokesman said more than one million plastic bottles were sold at 2017's occasion.
Ms Eavis said it was "paramount for our planet" to diminish plastic consumption.
"I'm thrilled that, together, we'll be able to prevent over a million single-use plastic bottles from being used at this year's festival."
Acts confirmed for this year's occasion include Janelle Monae, Stormzy and Kylie Minogue.
The festival, held in Pilton, Somerset, since 1970, had a "fallow year" in 2018 to allow the ground to recover.
Ms Eavis, the daughter of author Michael Eavis, revealed to Radio 6 Music the ban was "the big project" for 2019.
A Glastonbury spokesman confirmed the plans were in the pipeline however said it was "a bit early to put any flesh on the bones" regarding details.
He said: "It's a massive thing which everyone at the festival is working on."
Glastonbury Festival, held in Pilton, Somerset, since 1970, is having a "fallow year" in 2018 to allow the ground to recoup. It is because of return in 2019.
Arriving at the NME music awards in London on Tuesday, Ms Eavis revealed to BBC 6 Music: "There's lots going on at the moment.
"We're working on banning plastic bottles... which is an enormous project and it's taking a lot of time to tackle it with all the different people we work with.
"But that's the big project at the moment for 18, to get rid of plastic bottles across the whole site."
At the point when asked how the line-up was shaping up for the following festival, she said: "Everyone wants to play the 50th anniversary in two years time."
In 2014, the festival presented water kiosks where festival-goers could get any kind of container refilled.