I predict a riot

[pozorvlak]

Judging by the policing of the G20 protests in April (the ominously-named Operation Glencoe), current Met crowd-control doctrine is as follows:

• Illegally detain ("kettle") thousands of peaceful protestors for hours without food, water or toilet facilities.
• Prevent journalists from taking photographs inside the kettle.
• Carefully allow a few windows to

Comments

[taimatsu]

My brain is presenting me with a plastic box (ice-cream tub size, or bigger?), which you put in your rucksack - ok, that's bulky, but it's got plastic liners in which can be filled and removed. The box could have a lid with a funnel-type thing to wee in; extra cardboard pieces could be provided to make this easier for women. When the liner is full you just remove the lid and take it out, tying the top, and put in another.

It would be bulkier in the bag than a bottle, but it would have far more capacity for that size. You could use swingbin liners for the inside if nothing better were available. I guess you'd have to test how good they are at retaining liquid!

[johnckirk]

I can't really comment on the G20 protests, since I wasn't there. However, when I took part in the WNBR in June (a peaceful protest) the police were nothing but supportive. They didn't try to confine us anywhere, even though that would have been quite easy (since we all started out in a big crowd at the assembly point before the ride) and they actually cleared the road to help us get through. So, I don't think there's any policy in place to say "All protestors are enemies of the state". Either they changed their approach after G20 (in which case problem solved), or they just react to the conduct of protestors on the day (i.e. there really were idiots causing trouble at G20

[half_of_monty]

General thumbs up.

Some sort of funnel device would make it much easier for women to use them. Also, advising women to wear skirts would allow them to maintain a semblance of modesty. (Presumably this is where gendered clothing being this way round came from).

[pozorvlak]

Presumably this is where gendered clothing being this way round came from

Possibly, but men have worn skirts in plenty of cultures.

[ext_5743]

What's actually wanted is a photographer's bottle, the kind used to hold darkroom chemicals. They have a wide mouth for easy filling, but crucially have a bellows-type design allowing them to be squeezed down for easy storage.

http://www.jackthehat.co.uk/collapsible-chemical-bottle-p-320.html

And they're watertight and resistant to chemicals...

[pozorvlak]

Awesome! A bit expensive for this purpose, but otherwise damn near ideal.

[ext_5743]

Cheaper here -

1 or 2 litre size:

http://www.firstcall-photographic.co.uk/shop/categories/film-processing-equipment/0/jobo/jobo-chemical-storage-bottle-3395z-1-litre/

http://www.firstcall-photographic.co.uk/shop/categories/film-processing-equipment/0/jobo/jobo-chemical-storage-bottle-3396z-2-litres/

[ext_5743]

Ah, and it turns out that the correct term is an "accordion bottle"

[dreamstothesky]

Freezer bags are my urine recepticle of second choice; there's no where else to go in a glider at 4000' feet :)

Girls tend to just wear nappies.

[dynix]

possibly worth lining them with solidifier to make storage/disposal better?
http://www.imtek.biz/page/N/CTGY/sg-ursd

[susannahf]

you can actually buy bags pre-filled with those granules, but it increases the volume of what you're carrying significantly. I actually think John's idea of wine box inners is probably the way to go...

[pozorvlak]

You mean Ziploc bags? That sounds... risky.