shaken not stirred question!

Now that I think I've gotten the boondoggle of entry under control, on to the important stuff!! What do y'all use for a "drink shaker" or do you bring yours from home?

We're on a Marine Max 484 in 6 more sleeps!! Wahoooo!!

Other than gin and vodka tonics, the only cocktail we've made aboard is a batch of Painkillers ... and for that we use a gallon water jug. Plenty of room for 3 quarts of ingredients and enough empty space to shake it good. I don't recall ever seeing a cocktail shaker on any of our bareboats.

Improvise!!! Necessity is the mother of invention, someone once said.