You can recycle ANY ink or toner cartridges, up to 10 per calendar month per customer and receive $2 back in Staples Rewards per cartridge when you spend at least $30 on ink in the past 180 days Limit one Staples Rewards account per address. You can recycle additional cartridges but Rewards will only be issued for 10 per calendar month per customer. Your Ink Recycling Reward will arrive each month, separately from your other benefits.