It's a sales term, a contraction of "two for [the price of one]".
See: https://www.merriam-webster.com/dictionary/twofer
--VORAGH
> -----Original Message-----
>
> voragh:
>> {tuqmeyraj} not *{tuqpu’ra’} – two such suffixes (a “twofer”)
>
> thank you voragh for sharing these canon examples. but what is a "twofer" ?
>
> qunnoH jan puqloD