Freezer temperatures are usually below -18 degrees Celsius, which is the temperature at which glass breaks. Glass is made of silica, which is a very strong material. To break it, you need to apply enough energy in just the right way to cause internal stress fractures to start propagating through its structure. You can do this by dropping your glasses on hard surfaces (like concrete), but doing so will also likely cause them to chip or crack as well as making them useless for drinking out of until they're professionally repaired.
The safest way to break a glass in your freezer would be with another similarly sized piece of glass that has been cooled down by being immersed in liquid nitrogen or frozen solid outside an insulated container (so it doesn't heat up when placed inside). If both pieces have been dipped into liquid nitrogen and then dropped onto each other while still frosty, they should shatter!
If you have no other option but to put glassware in the freezer, make sure they are wrapped in plastic wrap or a plastic bag. If possible, put them in a container that is not airtight—this will help prevent cracking and keep the air flowing.
Plastic wrap can be used for an extra layer of protection for fragile items and even to cover sharp edges (like knives) when storing them in the freezer.
If you're worried about your glasses breaking in the freezer, there are a few things you can try. First, put a glass or two in the freezer for 24 hours. Remove them and check them for any cracks—if they're not cracked, then it's safe to use the freezer with that glass.
If your glasses still break when you put them in the freezer, don't worry! You can fix this by placing an ice cube between two sheets of wax paper (to prevent scratching) and wrapping it safely around the broken pieces before putting it back together again under hot water.
It is true that if you leave a glass in the freezer for an extended period of time, it may break. This can happen when the glass thaws and expands as it absorbs heat from the air around it. However, thicker glasses are more likely to survive than thinner ones; this is because they have more thermal mass and will not expand quite as rapidly when they thaw.
You may be wondering if your glasses will break in the freezer. In order to answer this question, there are a few things you should do first:
If you want to avoid it altogether, then at least make sure that your freezer is set at a temperature that won’t break any glassware!