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McDonalds clear plastic McCafe cups and lids are PP5


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#1 jrh

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Posted 15 January 2021 - 11:44 AM

Just as an FYI, it looks like the clear plastic cups and lids at McDonalds are PP5 and thus can survive a PC.

 

PXL_20210115_163046460.jpg

 

It looks like they get used for large McCafe drinks, shakes, and orange juice, and also medium fountain drinks, iced tea, and iced coffee.

 

They might be useful for anyone doing micro grows.

 

I know, it doesn't take very much to interest me.


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#2 bezevo

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Posted 11 February 2021 - 01:54 PM

one cake wonders  .. kinda cool idea for  for stealth mycro groow ......ONE CAKE WONDERS  or stack two cakes heh

 

interesting


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#3 DiSc0Rd

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Posted 12 February 2021 - 01:15 PM

Nice
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#4 sandman

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Posted 13 February 2021 - 11:31 AM

The problem with this cup shape, and also with deli containers, is the tapered shaped makes it hard to shake the substrate without leaving the bulk of the container empty. Also the flimsyness makes shaking tend to pop the lids off.

 

I have searched and bought several PP deli containers in bulk to find the thickest ones but the shape is just shit.


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#5 rockyfungus

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Posted 13 February 2021 - 12:38 PM

Never had issues with a glad "deli container", but I guess most of my experiments with old mozzeralla containers, or yogurt containers do get screwy.

 

They are better for spawning, then grain.

 

delicontainer.JPG


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#6 Moonless

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Posted 13 February 2021 - 01:24 PM

Yes!

And I have done this before.

But the cups I used came from an establishment that rhymes with bar mucks!

They are better to use upside-down
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#7 bezevo

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Posted 13 February 2021 - 02:54 PM

with cakes  i image ........cake goes on lid .  1/2 pint cake ?


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#8 Moonless

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Posted 13 February 2021 - 03:00 PM

Half pint of cakes with the cups over them works.

I never tested it but my gut tells me the 4 oz of cakes would be better, more space etc etc.

But the best results was spawning to a cylindrical container with the same diameter as the cups and placing the cups on top, taped down with microphone tape. I used a fancy gelato brand's container for this method.

Edited by Moonless, 13 February 2021 - 03:01 PM.


#9 Moonless

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Posted 13 February 2021 - 03:05 PM

Cups like these do far more for us than fruiting chambers for home mycology. Any plastic cup, weather it's pp5 or compostable, can be reused for starting seeds. Fill the cup halfway and snap the clear lid on. You have yourself a greenhouse.

Just be careful as non pp5 plastic will melt and deform under hot water.
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#10 sandman

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Posted 13 February 2021 - 05:20 PM

It's just PP, there is no such thing as PP5.

 

5 is the recycling code for PP plastic.

 

Eye twitch averted 

 

Also there are several other plastics that are autoclavable such as polycarbonate and nylon. PE is a no go.


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#11 rockyfungus

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Posted 13 February 2021 - 05:23 PM

Resin codes not recycling. Plastics are not as readily recyclable as they have you believe.

 

https://en.wikipedia...tification_code

 

[Direct Link]


Edited by rockyfungus, 13 February 2021 - 05:25 PM.

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#12 Moonless

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Posted 13 February 2021 - 06:14 PM

Yes it is better to reuse plastic. It it reuseable



#13 sandman

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Posted 13 February 2021 - 06:38 PM

unnamed-5.jpg


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#14 FLASHINGROOSTER

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Posted 14 February 2021 - 11:54 AM

Gonna Take Pollution Down To Zero


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#15 Oldpunk

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Posted 21 March 2021 - 08:47 PM

I have a question on the PP5 plastic. Is it just to ensure it survives a pressure cooker (which I don't have)?

Not something more nefarious like chemicals leaching off into my shrooms?.

I just started some experiments with random containers and have wanted to pose this question.

#16 FLASHINGROOSTER

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Posted 22 March 2021 - 04:27 PM

From what I understand the five rating is for higher heat resistant plastics that you could consider food safe. Stuff like baby bottles or this hard plastic cup I am currently drinking out of are often made out of it

 

Plastic number 5 (Polypropylene or PP) is a thermoplastic polymer prized for its resistance to heat and fatigue (constant bending), strength, toughness, and flexibility. It is considered one of the safest plastics because it does not leach chemicals. It’s found in yogurt containers, baby bottles, and microwaveable kitchenware.


Edited by FLASHINGROOSTER, 22 March 2021 - 04:29 PM.


#17 Oldpunk

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Posted 22 March 2021 - 06:10 PM

Thanks.

I just remember seeing lots of mention about it while reading through old posts. And I just found myself wondering if the lesser plastics might be unsafe to grow in....even though a little plastic off gassing wouldn't be the worst thing I've put in my body to get high




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