That depends on whats in the flask. Most alcohol is safe with out being refrigerated. But if the bottle says refrigerate after opening, then yes.
cool bag ice block food flask fridge/freezer
Yes, you can put canned food in the fridge.
Yes, it is safe to put tequila in the fridge. Storing tequila in the fridge can help preserve its flavor and quality.
you have to put it in the fridge so it will make the pastry go less vunerable
Yes, you can put cans in the fridge to keep them cold.
Yes, you can put tequila in the fridge to keep it chilled.
"Function?" It's a flask. You put stuff in it. There's not a whole lot of functioning involved.
No.
Yes, you can put pears in the fridge to keep them fresh longer.
Yes, you can put an open beer in the fridge to keep it cold.
Yes, it is okay to put avocados in the fridge to slow down the ripening process.
Yes, you should put kiwis in the fridge to help them stay fresh longer.