Arrrgh, the old Archimedes' principle. Not recommended for trash bins - risk of drowning and risk of flooding.
Unless you are a super fit person that can lower yourself in on your arms, and bend your legs back at the knees, so your knees reach the bottom of the bin, a 240 litre bin is too small. Not just for the tight fit, but also because you are too tall. I am 5' 9" and it is difficult to shut the lid.
I would recommend a 360 litre wheelie bin. There is room to sit down in there !
I have written various wheelie bin tips, on this site. Be sure to read them, especially the bit on polythene liners that can seal the wheelie bin (stops smells getting out AND fresh air getting in), so keep the lid ajar. If you get a headache or feel sleepy, it could be a sign of a lack of oxygen. Also beware of getting in bins in a public place, other people use them on the sly, and you don't want to be caught naked. Its just too many questions ! LOL. Play safe and live to play again.
Daffy