These are very cool stickers, aka the "EcoGreen Stickers" made by Jak Prints.
They told me that Jakprints also reduces the environmental impact of the company in many ways including stocking papers with at least 30 percent recycled content, using bio-washes and bio-degradable chemicals and offering discounts to customers who bring paper for recycling.

Highlights:
- Acid free
- No toxic agents
- Vegetable based ink
- Made out of limestone
- No water consumption

Tags: company, eco-friendly, labels, natural, Office, stickers, toxic free, vegetable based ink