Very few containers won't burst if they are full and they freeze.
Come to think of it, I have a 1.5 litter (48 ounce) nalgene water container like the one shown below at my camp that is 85% or 90% full of water .. I had two of these and before I had my camp I used to leave them in my truck camper all winter with water in them. It has been sitting there at my camp full of water for the past 3 years or so and through the winters and has not split or cracked when it must have frozen and thawed many times over .. I think someone told me that that was the type of bottle to use for freezing and they are a soft plastic type of material .. I just left it there and forgot about it .. That's why I am thinking these 1 gallon nalgene of the soft plastic type would also work because it is very similar .. It's a soft plastic though a bit thicker. It's nice to have durable water containers that can freeze and not give out ..
https://www.rei.com/product/629248/nalgene-ultralite-wide-mouth-water-bottle-48-fl-ozreview comment from that product:
"I love these white Nalgene bottles as the more flexible plastic freezes well, whereas the standard clear Nalgene bottles are more prone to shattering when freezing water in them. The 48 oz. bottle is great for packing extra water without taking up extra space. Fits just as well as the 32 oz. in the outer mesh side pouch of my pack."
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so, actually these bottles are made of Polyethylene or high density Polyethylene. If you look at this product in the comments, one other reviewer says that these are freezable
https://www.amazon.com/Nalgene-HDPE-Mouth-Round-Container/dp/B002PWPL4Q=================
it's hard to google for polethylene freezing because there's alot of hits that say 'is it safe for your health ?' or 'will the plastic break down and leach chemicals ?' etc .. but if it's for emergency use or cleaning etc, then it wouldn't even matter anyway
but here is some kind of freeze container made of polyethylene
http://www.sigmaaldrich.com/catalog/product/sigma/c1562?lang=en®ion=US==============
https://www.theplasticbottlescompany.com/type-plastic-use-freezing/Which Type Of Plastic Should You Use For Freezing?
4. What kind of plastic are you using?
Polyethylene terephthalate (PET) can be used and reused, but repeated washing may cause toxic chemicals to leach from the plastic into the contents. Recycle them when they become cloudy or cracked.
High-density polyethylene (HDPE) containers are frequently used in the food industry for freezer containers.
Low-density polyethylene (LDPE) plastic containers do not leach toxic chemicals into food and are often used for freezing foodstuffs.