my company has one of those upright water fountains with the 4 gallon jugs. I keep the empty ones and cut off the bottom and use them for either mini greenhouses to start plants or If i need them this spring as quick cover for frost. Im sure recycling centers have a ton of them.
Same idea as using pop bottles just bigger, and bigger is always better, right? LOL.

Here is my biggest recycling tip. In fall when all the big box stores are starting to throw out dead plants I dumpster dive for the containers. I pulled about 100 4" pots, a few 6-8" pots, some flats and even a few hanging baskets. Nothing beats free pots for veggie seedlings

mike

What do the bottles look like? Our bottles all require a $5 deposit.

they buy them at Sams club with no deposit. The bottles are the typical transparent blue