Might be me, but I think they grew between panels.
By no means fastOikawa
MilkPhew— That was delicious—♪Oikawa
MilkGo—*gulp*There's a lot of milk too, you know— How about a speed drinking contest—?Ready...*gulp*Well then, let's go for it—♪Oikawa
Milk*gulp*Oikawa
Milk
Cinderella Girls Theater
劇場第460話『早飲み対決ですー』
Theater Episode 460 - Speed drinking contest~*gulp*Huh? I always just chug a whole liter in one go, you know—?My family has sent me lots of different dairy products, so I brought some of them here—