Pressing the raspberries through a fine-mesh sieve will get every drop of juice into this refreshing limeade while leaving those pesky seeds behind. If you want to make it ahead, don’t add the seltzer until the last minute.
- Combine lime juice and sugar in a large pitcher, stirring to help dissolve the sugar.
- Place berries in a fine-mesh sieve over a bowl. Use a rubber spatula to press on the berries, extracting the juice and some pulp while leaving the seeds behind. Stir the puree into the pitcher.
- Just before serving, stir in seltzer. Serve over ice.