Okay my maths was wrong a 500ml can is about 20 fl oz...... Anyway here's the link to the pic next to said can. I measured the cups/domes and they are about 8 inches high and internally 6 inches across.
https://1drv.ms/u/s!AkceUJ2repcfgc1yIZvPVybcM6JpOw
I can almost fit the can entirely inside the dome sits about a cm off the surface with the can in it.
https://1drv.ms/u/s!AkceUJ2repcfgc1zgQJhib5oKnToWg
Yep they are massive a quick test pump the other day was interesting, they really swelled up nicely. Once I have my airlock valves (trying to hold both in place and pump without a willing volunteer is a little tricky) I'll post a picture of them pumped. They have grown more since my last pic so am really not going to be able to hide these much longer if the pumping is as effective as I think it might!
Megan
https://1drv.ms/u/s!AkceUJ2repcfgc1yIZvPVybcM6JpOw
I can almost fit the can entirely inside the dome sits about a cm off the surface with the can in it.
https://1drv.ms/u/s!AkceUJ2repcfgc1zgQJhib5oKnToWg
Yep they are massive a quick test pump the other day was interesting, they really swelled up nicely. Once I have my airlock valves (trying to hold both in place and pump without a willing volunteer is a little tricky) I'll post a picture of them pumped. They have grown more since my last pic so am really not going to be able to hide these much longer if the pumping is as effective as I think it might!
Megan