Piping nozzles but no icing bag - any alternative?

[Shufflebumnessie]

I've just made cupcakes for DD birthday. I got the icing bag out for the buttercream and discovered it's disintegrated on the inside (you can guess how often I use it!!). I have several nozzles but no bag. I haven't got time to go and buy a new one.
Does anyone have any suggestions of what to use as a substitute bag with the nozzles.
Thanks in advance.

Freezer / sandwich bag

Yes, just snip the corner off any clean plastic bag

As above, cut the corner off a (food grade) plastic bag.
The slightly thicker ones work better, if you have a choice of brands

Make a large square of baking paper.
Fold in half and half again.
(See diagram!).
You can fold again diagonally if you wish. Then cut the end off and stick the nozzle inside one of the sections. Squeeze!
My mum used to do this.

Amazing! Thank you all so much for the suggestions (& diagram! - love it!!). I knew MN would save the day 😁