Envelope Reuse Labels (to help hedgehogs)
Use British Hedgehog Society Envelope Reuse Labels, to easily reuse envelopes. Just slap a gummed label on any envelope, and send it on to somewhere else. As well as saving paper, the envelope labels are sold by the charity, which offers instant telephone and online help, to preserve our prickly endangered friends.
The cute design also alerts others, who may also be inspired to order some too, and this creates a viral loop of saving both hedgehogs and trees.
If you send a lot of internal mail, Lopees (Australia) make organic cotton reusable envelopes. Ideal for to-and-fro mail and internal mail, these have zips and name labels. Just one order could last years, if you don’t lose them.