Chill a 16–20 oz serving glass in the freezer for 5 minutes while you prepare ingredients. Hull and thinly slice 2 of the fresh strawberries; reserve one slice for garnish.

Add the sliced strawberries to the bottom of the chilled glass. Lightly muddle them with a muddler or the back of a spoon (3–4 gentle presses) to release juices but keep some texture.

Fill the glass with ice cubes to about 3⁄4 full (about 1 cup of ice).

Pour 8 fl oz chilled Poppi Strawberry Lemon over the ice and muddled berries, then top with 4 fl oz chilled Poppi Peach to create a layered strawberry–peach blend. Do not stir vigorously; a gentle swirl with a straw is enough to combine while keeping a pretty gradient.

Cold foam topping

Combine 1 tablespoon chilled low-fat milk (or oat milk), 1 teaspoon vanilla protein powder (or powdered creamer), 1 teaspoon powdered sugar (or 1 tsp simple syrup), and 1 teaspoon heavy cream (optional) in a small jar or frothing pitcher.

Use an electric milk frother for 15–25 seconds or a small handheld frother until the mixture forms thick, dense foam. If you don’t have a frother, shake vigorously in a lidded jar for 45–60 seconds then whisk to stabilize; foam will be lighter.

Let the foam rest for 5–10 seconds to thicken, then gently spoon a generous 2–3 tablespoon layer of cold foam on top of the soda. The foam should float and form a creamy cap.

Garnish & finish

Place the reserved fresh strawberry slice on the rim or float it on the foam. Optionally grate 1/4 teaspoon lemon zest over the foam for a bright aromatic finish.

Serve immediately with a straw (stir before drinking if you prefer uniform flavor).