A housemade sachet can be used to infuse both hot and cold drinks. Here, Maxime Belfand, bar director for AvroKO, offers his Tonic Blend, a combination of citrus peels, chamomile and juniper. Mimicking the flavor of tonic, this works especially well in vodka-based drinks. To use it, dip one Tonic Blend sachet in hot water briefly, squeeze out excess hot water, then steep in two ounces vodka for three to five minutes.