Help!

In starting this company, one of my major ethe is to be plastic-free. This makes it really difficult to ship in the summer. The temps, as chocolate travel through the mail system, means that unless I wrap everything in styrofoam and cold gel packs, my product will arrive damaged. So I suspended summer shipping, which is killing me. Do YOU know of any other non-plastic solutions? I know there's a company that uses mushrooms for thermal packaging but they seem to be out of business as none of my attempts to contact have been returned. I would LOVE to ship chocolate to you. But my hands are tied. Anybody got anything? I appreciate any and all replies. You can post here so the world can see or contact me directly at mark@pollinatorchocolate.com. Thanks.