When using a traditional stainless steel shaker you may sometimes find that the top gets stuck on the base. You can get the martini out through the strainer top, but you’ll want to make another round soon and it’s your only shaker! Before you panic, simply place the entire shaker in your freezer for a few minutes. Then set it out on the counter. The colder temp will cause the metal to contract a bit, allowing you to remove the top with ease. I’ve even had it pop off of it’s own accord.
Now you can make your next round.