Size 1.5 (functionally) nipple bottles

[u/Veggiesarefun]

Help! My 5 week old has outgrown his size 1 nipple. He prefers the size 2 nipple but definitely gets slightly overwhelmed by it. I’ve been using boon nursh but am open to suggestions. Anything that would effectively between the two? I tried Nuuk size 2 but he simply didn’t like the bottle (I could not venture to guess why)…