Divide and strain the cosmo between the two glasses. You may have to clear the strawberry bits from the holes in the shaker cap, but keep doing it until all the liquid has been poured.
Add the two strawberries with the slit in the bottoms on the side of the glasses.
Nowadays, you can find strawberries year round. This means you can make strawberry infused vodka whenever you want, unlike cherry infused vodka, which you can only make a few months of the year, thanks to the cherry’s short growing season.
Always wash strawberries well because they are among the ten fruits with the highest pesticide levels. It's especially important because you are going muddle a strawberry in the shaker as well as using a few as garnish.
Don’t soak them as strawberries easily absorb water, which dilutes their flavor and sweetness.
To wash, remove the leaves with a strawberry huller or core them out with a knife leaving as much fruit as possible. Then put them in a colander or sieve; run water over them; take them in your hands and gently rub each one with your fingers to make sure you clean it.
After they are completely washed, place them on a paper towel and dry them off or let them air dry for several minutes.
If you don't have time to make strawberry vodka, you can buy it from a liquor store but you are surely missing out. So try to make the time.