The 50-strong range is an extension to the wholesaler's existing Essentially Catering range and includes products such as canned tomatoes, orange juice, washing up liquid and Cheddar cheese.
Bestway claimed that all the products were affordable and priced "significantly lower" than their branded equivalents.
It added that it was also offering a 'no quibble, double money back' deal and a discount offer of at least 5% on case sales.
The launch of the new range kicked off with a six-week deal offering customers the chance to exchange coupons for free cases of products.
"Catering continues to provide a huge opportunity," said Nick Brown, the controller responsible for the Big Pack brand.
He added that the format was designed to help caterers of all kinds, from pubs and clubs to restaurants, cafés and the B&B market, to maximise the value and profit of their purchases.
Bestway has been bolstering its catering offer since acquiring Martex Cash & Carry in November last year. Martex has a significant foodservice business in Scotland.
Earlier this year Bestway Wholesale Group MD Younus Sheikh said Bestway was "taking catering very seriously" and was increasing its sales force, widening its delivered service and expanding its online coverage.