[Plugin: Woocommerce] Show Attribute on Order Summary

I have some products that are sold in 10s and some in 20s but to the punter they are just called “bunches.” What I need to be able to do is put something on the product page to tell me that product x is sold in 20s that follows through to the order summary page so as I remember to put 20 of product x in the bunch not 10. The customer doesn’t need to see any of the info it is just for me to have a reminder as to how many go in a bunch without having to look back at the product page.

Any thoughts?

Jess