[irishjuggler]

I don’t think that a standard paper milk carton could handle the pressurized contents of a carbonated soft drink. It’d have to be thicker, stronger paper and the sealing system would need to be more durable.

[al baby]

what if opening the container releases the carbonation from a pellet

[Republican Wildcat]

Which would raise the question as to whether or not it is really any more environmentally friendly...

[Svartalfiar]

and the sealing system would need to be more durable.

But remember, it can't be plastic! Not sure how you make a sealable opening with just paper.?