Don't know the plastic - it's nice and flexible and 'very' tough.
No - you don't need your own hospital!

I made a funnel to fill it with a cutoff drip chamber used upside down.
But a lot of folk have connections with say, nurses, techs, and ambulance staff who see out of date stuff being tossed for no other reason than it 'died' last night. If I need one it's easy I just grab it. A liter of 'water for injection' makes very good developer.
I made a small batch of FX-1 concentrate and stashed it in the fridge in a 100ml bag - there was a precipitate when I looked later so after shaking it I just went ahead and sucked out what I needed - the stuff all disolved and the film came out fine.
IV caffeine - especially when one is 'seedy' the morning after!.
Murray
Murray,
Do you know what they are made of? Do you have to have a hospital of your own in order to get them? I like the idea. There are chemicals that ought to be refrigerated.
Besides, I've always thought that IV would be a great way to take coffee.
L.