can we use Plastic ice jugs in the fridge when boon docking?

I would think you’d need quite a few ice jugs to keep it cool. This takes up food space. And think about the recovery time to cool fridge off after you opened the door. If your fridge is only 12v / 110v then a small 1000w inverter / generator would be best for battery charging.

This fridge is 12 volt only so no propane option. when I said boondocking, I should have clarified it better. I would also use this when staying at a non electric campsites. A lot of the federal campsites in MO that we stayed at in the past are all non-electric. Not only that, but MO state parks now allow reservations 12 months in advance. So unless you want the electric site next to the dump station you have to book 364 days and 22 hours ahead of time. That's why I am asking about non-electric options. I know some of the invertor generators can be pretty quite, but I would rather not be that guy that has a generator running all weekend. In the past I've used plastic 1 or 2 liter soda bottles and or plastic half gallon orange juice jugs in my cooler. They seem to work well keeping food cold and you don't end up with wet food like you do with just a block ice. Since this space is so much larger than a cooler I wasn't sure if it would work.
thanks everyone for you incite, I appreciate it.

A solar panel would help however that is in full sun all day. Typical campgrounds don’t have that. I camped beside a guy this past summer and he had a 200 watt portable unit. He was always moving it to catch the sun. He said it doesn’t keep up sometimes and has a Honda generator as a backup. In the back of the truck you could barely hear it. I bought a pair of Firman 1700 watt inverter generators with a 50 amp parallel kit just in case we need AC. They’re quiet but not quite like a Honda. 1400 CDN bucks for the pair and the PK. I wanted the pair due to weight of a single 3300 Firman. I’m not getting any younger lol.
And here too, if you’re not on the ball to reserve a campsite, your not getting an electrical one.

Lyle, I heard substitutions were made on fridges due to supply issue of propane fridges. This I learned back in April when I was looking for a new camper. Another brand I looked at had nothing but 12v fridges in theirs. I felt it wasn’t right for us especially with the campground issues in the last couple of years.

A lot are starting to use the refrigerators with 12 volt compressors. Probably less expensive than the absorption type and no venting required.