Fill ice cube tray with filtered water, and add a thin pear slice to each cube.
Zest lemon and generously sprinkle ground cinnamon over ice cube tray. Allow cubes to freeze before continuing to next step.
To make the pear puree: Peel the skin from 2 small Anjou pears, slice, cube and blend on high. Add water in small increments if the mixture is too thick. Pear puree should look like thin applesauce.
Fill cocktail shaker with plain ice (not the infused cubes!), and add pear puree, gin, simple syrup, and a generous squeeze of half a lemon.
Shake vigorously for 15 seconds
Add one large infused ice cube each to two cocktail glasses. If you made smaller ice cubes, add several to each glass!
Strain into your cocktail glasses, and add a splash of soda water to top off.
Optional: Garnish with an extra dash of cinnamon and add a cinnamon stick for swizzling.
Enjoy responsibly!