If the bottles are standard everyday bargain brands then I don't see much problem with mixing them together by type. However it would seem a shame to take a premium bourbon and mix it with something cheap. As for your other question, I'd guess it is as safe as having separate bottles. Unless the cocktail recipe specifies a specific brand I doubt it will ...
I do this all the time with tequila, both blanco y reposado (havent tried with a mezcal as I prefer that super Smokey “green” flavor) — you get all of the other subtle aromas/flavors that you would normally miss at room temperature; it also makes for an eeeeasssy and smooth shot. (chilled Casamigos reposado tastes like toasted marshmallows, i don't get that ...
I have a fairly opposing view to Eric's so thought I should post it as a separate answer:
While there may be some spirits that may be okay to mix almost all spirits have distinct differences between brands.
Vodka: if you have plain vodkas, designed to have as little taste as possible, and just add alcohol to fruit juices etc, these will be good to mix. I ...
As a food engineer I can confirm you that the taste of the food (here beer) also changes in a bottle vs. can as the light (UV mainly) interacts differently than in a can where the light does not penetrate.
And as mentioned before in the case of beer, the quality of the water is very important and factories located in different locations use different ...
How can I prevent beer cans from exploding?
The best way is to keep the beer cans out of direct sunlight and store them in a cool environment as best as possible.
Normally cans of beer should not explode and your situation as mentioned in the comments is an isolated event. Your can may have been defective in some way or became damaged during transport.
Indian Army supply of Alcoholic beverages?
Are the supplying companies special for armies?
Regardless of which national forces (army) one is in, the main reason for suppling some for of booze is to boost troop moral.
Generally supplies will be obtained by local sources as best possibly done. There are no supplying companies special for armies? Local ...
In addition to the different rates at which the container warms up in the hand, there could also be the effect of the weight of the container itself.
I've long heard that gin tastes far better when served in a heavy glass.
A quick google shows that the effect can apply to other drinks too:
Secret to the perfect drink: serve it in a heavy glass, say experts
So, besides the light changing the chemical makeup of the beer in bottles thing, drinking from a can absolutely modifies the flavor for me - because of the smell of the aluminum. But, pour it in a glass and I bet I wouldn't be able to tell the difference between any fresh container of the same beer.