As you have asked about the Recycled Polyethylene Terephthalate (RPET) PLASTIC TRAYS manufacturers in Mumbai, I am mentioning them, check below for the details

Creative Plastics
No. 74, Mistry Industrial Complex,
MIDC Cross Road- A, M. I. D. C., Andheri East
Gundavali, Andheri East
Mumbai, Maharashtra 400093
022 2687 0710

Nakoda Plast Industries
Building No. K-60
Sonal Heavy Industrial Estate
Ramchandra Lane Extension, Kanchpada, Malad West
Mumbai, Maharashtra 400064
022 2882 0873

Jal Extrusion Pvt. Ltd.
404, 4th Floor, A Wing, Inside STC Colony, Kailash Tower,
Opposite Regency Hotel, Andheri East, Off. Western Express Highway
Margdarshan, Bima Nagar, Andheri East
Mumbai, Maharashtra 400069
098200 99018

Jain Plasto Pack
G1/A, Virwani Ind Estate, Goregaon East,
Yashodham, Goregaon
Mumbai, Maharashtra 400063
022 2927 1641

Gem Plast
Yogi Industrial Estate, 227, Ram Mandir, Road, Goregaon West
Goregaon West
Goregaon
Mumbai, Maharashtra 400104
022 2676 3843

Hosco India
49 & 50, 1st Floor, P.M. Road,
Hi Life Mall
Railway Colony, Santacruz West
Mumbai, Maharashtra 400054
022 4023 7031