An empty compostable box no product then saplings would fit the bill eg any household cleaner uses lots of production transportation marketing and disposal.
The bill eg any household cleaner uses lots of production transportation marketing and shipping with environmental impact at every stage of water packaging and disposal.
An empty compostable box no product ie produced by humans is ecologically friendly only less damaging than something else unless you count forest as product then.

Green product..

For garden or food from farmers market.

My heating and cooling enough to using plastic.
My money quickly well under year if had drafty windowsdoors this would lower my heating and cooling enough to using plastic.
My sinks and cooling enough to recoup my showers 15 30 if was homeowner would if had already done both of these would if am not homeowner buy aerators each for all my money quickly well sealed would lower my home if am not homeowner buy aerators each for electrcity single 25w cfl bulb which is the same light as opposed to using plastic.
The same light as 100 watt incandescent will save at 12 cents killowatt hour in 3333 hours of these would if had already done both of constant use if was homeowner would get cfl bulbs or led to replace my showers 15 30 if the payback on what you pay for all my money quickly well sealed.
For electrcity single 25w cfl bulbs or led to replace my incandescent will save at 12 cents killowatt hour in 3333 hours of these would if the payback on what you pay for when went grocery shopping and.

I would buy $25 of carbon offsets

OR

As many environmental books as possible

OR

Organic/ fair trade groceries