Is this a drugs thing?!

[Moltenpink]

While out hunting for snails, my son has just found a carrier bag filled with four or five jam jars. Each jar is light, but looks like it is filled with salt and pepper and is sealed with a tinfoil lid.

Any ideas what they could be? It’s right by an alleyway where it always looks like some dodgy deals happen at night.

Growing magic mushroooms

are their small holes injected into the foil?

Injected into the foil?!
What the chuff are you imagining?!

OP the only thing to my knowledge that uses foil is crack or heroin (smoked). But I can't say I've never known someone to use a jam jar.

I do know it's possible to smoke crack using a coke can, so perhaps they were just being inventive?

Injected into the foil?!

That is apparently how you grow magic mushrooms. You get a jar of special substrate and then inject the spores into it. There was an instructive article about it in the Guardian at the weekend.

Well I never knew that!
They grown in abundance on the South Downs so homegrown mushrooms has never been something I've come across.

I did it years ago with nutella jars (so you can slide the substrate out the top in one piece when its ready). The buy the spores in a huge syringe you have to inject through the top foil

the stuff inside is probably vermiculite.

Well you learn something new every day! I knew mumsnet would have an answer