Choose a mason jar or highball glass that is sturdy. You can choose to use a cocktail shaker too if you prefer. If you choose a thiner glass, it may break or chip the glass. 2. Muddle the mint leaves in the bottom which means to crush with a muddler to break down ingredients into smaller pieces. 3. Add sugar, fruit, or whatever else and gently mash them together so pieces become smaller and some juices emerge. 4. Then pour in your liquid to make your drink of choice.