Does anyone know if there's supposed to be a tube connected from the underside of the bottle cap into the bottom of the bottle(to suck up the brake fluid) as mine doesn't, there's just a little bit of the outer tubing poking inside and it doesn't look right 🙄 I've never had a problem with it before but now I can't bleed my M4's and I'm wondering if I've lost the bit of tubing!!

Looks like you've lost the tubing.

Yes it's becoming increasingly likely that its on my garage floor somewhere,- maybe its under the lawnmower, I've not used that for a while either, I'll take a look!