Unlike muddling herbs, which requires a light touch, muddling fruit calls for force. In the case of fruits with rinds, like lemons or limes, you want to press hard to release the oils in the skin and the juice in the fruit. If you’re crushing up berries or stone fruits, you want to squish the heck out of them for as much juice as possible. There are times for restraint. This isn’t one of them.
Muddler with teeth
Pint glass or shaker tin