The 3.5" round "stained glass" image was inkjet printed one-sided, full color to
1- Brushed aluminum composite sheeting - metal on the outside, PVC on the inside - making for a lighter weight, highly durable and attractive material,
2- Vehicle grade magnet material, and
3- Corrugated plastic, more commonly known as coroplast.
We've done lots of coaster work like this over the years, but especially during Covid. Think: QR code coasters and stickers, and/or two-sided coasters on various thicknesses of Styrene where one side says 'Clean' and the other side says 'Needs to be Sanitized.'
Whatever your need, The Digital Frontier can help!