*Water filters
*Matches
*Lighters
*Hand crank radio
*Solar lantern
*Alkaline batteries (I've had some in a flashlight out there for 2 years, but how long really?)
*Solar panel
*First aid kits
*Soap/sanitizer

PS.Things that are good for 1 or 2 years in the cold, I'm probably not going to bother with, it's too much of a risk.

I would think you need to think of the cold of the winter and the heat of the summer.
Also if dampness in the air will ruin the item.

- Solid bar soap could be stored , liquid soaps might freeze
- Toilet Paper if you can keep it dry so the dampness of rain / snow / moisture in the air doesn't get to it.
- Matches you need to keep from getting damp, so you could seal them in plastic with the food-saver

What are you storing inside the house ?

Almost everything on that list is already in the house, I'm just thinking backups. I'll be storing them in air-tight containers, so moisture shouldn't be an issue.

Extra Toilet Paper would be good to store in garage , properly stored, as it is bulky and
alot is needed.

I'll tackle the Life Straw question here, since you're consolidating. I'm of mixed minds about it. The manufacturer specifies room temperature for its shelf life, but without water in it, the risk of ruptures and clogs that come up in winter filter bashing shouldn't be an issue. On the other hand, once it's in use ... For the price of 3-4 lifestraws, you could get a ceramic drip filter that works with buckets or jugs instead, for the SIP plan, and maybe go with KMnO4 for bags. It has at least 5 years in single digits to triple digits (*F) if it's kept super dry and doesn't take quite as long of a sit period to decon in cold weather as some others.

On the rest of your list:
Depending on what's in the first aid kit, you may also need to check that. Burn ointments and some of the other gels can separate due to temp flux as much as actual temperature. Annual 60-80 degree swings don't favor a lot of things. Also, H2O2 and bleach are susceptible to both heat and cold denaturing. Rubbing alcohol is straight. Pure rubbing alcohol will pretty much survive a winter of earth-killing proportions. Iodine is fine, liquid or crystals. Liquid can have a few drops of alcohol added if it's less than 45-50% (enough to start freezing). Just thaw and shake really, really well for either wound wash or water disinfectant. Y

ou can also degrade the effectiveness of OTC and prescription meds with serious extreme temps. The listed dates are just a requirement in many cases, but some do lose a little to a lot of effectiveness oddballs can turn into harmful stuff after time (think the happy version of a radioactive half life, or something's half life taking it through a dangerous phase). Extreme temp and wide temp flux can mirror long storage life. It might be worth checking medical studies for anything in the kit.

You mentioned no food supplies, but if they're in watertight and rat proof containers, any type of salt and your sugar will be fine in your garage, hot or cold.

Are you looking for a list of other stuff besides tools, barn/shed regulars, and your list that can live out there, or just curious about the items you listed?

Forgot the lighters:
If they're butane, they should be straight. They won't light until you hold it in your hand and huff on it for a while, but it won't leak or expand and crack at -40. You just have to get it above freezing before it turns into a gas and can catch the spark and whoosh to life.

You mentioned no food supplies, but if they're in watertight and rat proof containers, any type of salt and your sugar will be fine in your garage, hot or cold.

So Salt and Sugar will never go bad from temperature?

You mentioned no food supplies, but if they're in watertight and rat proof containers, any type of salt and your sugar will be fine in your garage, hot or cold.

So Salt and Sugar will never go bad from temperature?

Nope. You could actually get them hot enough to change them, but it's the type of heat you'd use to turn sugar into caramel in a pan. Even into 110+ and back down to -10, it's fine. Humidity will kill the stuff, but if it's dry and tight, they'll last pretty much forever.

Brown sugar is most likely to turn into a brick, but smack it with a pastry roller, and it melts in oatmeal pretty quick. I wouldn't trust the soft cellophane/plastic bags from a store, both because of bugs and because it's prone to not being weather tight, paper bags by themselves aren't going to cut it, and epson, kosher/sea, and iodized salt needs to be packaged in something tight, not just their cartons in a Rubbermaid storage tub. A good Mylar bag with the original packing stacked inside and a bucket or storage tote that's tight enough to keep out mice, and it can live in a garage from The Island of "I landed on the sun" south of FL to Santa Claus Village.

Honey isn't too bad, either, and pure hone can handle wider temp swings that would reduce the storage life of other foods without any negative results. It can turn into crystals over a long time, but a little hot water when you're ready to use it, it's fine. Pure maple syrup can handle teens to 110-120 degrees F, too, for at least 2-3 years.
🙂