@baukepost Thanks for the feeback!
@tbrbn Cheers for that, appreciate the feedback! Also thanks for pointing me in the right direction with my memory. Turns out the champagne liquid itself was causing the issues, due to it having a volume absorption node, and this is apparently very memory hungry. Whilst that’s not inherently an issue I had it subdivided twice which basically caused my GPU to melt so after removing that it works fine, and I was able to render my half finished bottle:

It’s a bit odd how it was causing issues with rendering the interior due to the bottle being on a different layer but either way it’s fixed now, cheers for that!