I love loose teas and infusing ginger and the like into water. these feel like nice steardy quality. They are little bigger then i thought theyd be. Regular coffee cup or tea cup size they set above the cup and do not need to hang to insure they dont fall in. I think this could work nicely for cold brew it hang nicely on mason jar or glass of water. i may buy another set for my mother. oh one other thing i like the smaller holes making less tiny pieces falling into the bottom of the cup or glass