Great Britain's Michael Jamieson and Sophie Allen won their second 2013 World Cup silver medals in Moscow on Sunday.
Scotland's Jamieson, second in Saturday's 200m breaststroke, finished in the same position in the 100m, 0.41 seconds off Australia's Kenneth To.
Allen clocked a personal best 2:07:92 to add 200m butterfly silver to her individual medley medal.
The results are Britain's first podium finishes of the eight-meet series.
Lithuania's Ruta Meilutyte added 50m breaststroke gold to the 100m success she enjoyed the previous evening.
The 16-year-old, who is based in Plymouth, set a new world record on Saturday and came within nine hundredths of a second of American Jessica Hardy's four-year-old mark for the shorter distance.
Meilutyte also won the 100m individual medley ahead of Hungary's Katinka Hosszu, Allen's conqueror in the 200m butterfly.
South African Chad le Clos, who won the 200m butterfly gold ahead of legendary American Michael Phelps at London 2012, collected the 100m butterfly and 200m individual medley gold after 50m butterfly success.
The next event in the World Cup series takes place in Dubai on 17 and 18 October.