This isn't a subscription BUT they do have new boxes in LIMITED quantities each month. You just order when you want a box and don't worry about cancellation since it is not a subscription. You're always guaranteed certain necessities, but most importantly GLASS (and also discrete packaging!)
Sea trialed our boat for sale to a new owner on 420. Went great. Smoked a couple bowls of Klingon in our bong in WA. Our boat is a 45' trawler type. We lived on her for 8 years while waiting to refurbish an old house to live in.