"Greywater" is water that comes from your sink, shower, bathtub or washing machine. It's not drinkable, but it's still usable. You can water plants with it, or even install a "greywater system" to filter and reuse the water in your toilet tank.
These kitchen utensils are made from wood. It also gives me the vibe that they are a very green choice regarding kitchen utensils. Few words are written on the front of this packaging for this reason. Packaging can be worth a thousand words.