re: Cake Decorating Tips and Bags

As someone that has worked in the industry, in places of employment there was a preference for metal tips and the washable cloth bags with lining.
Not sure how you would improve the design… but I would be careful about any added cost for colours and patterns? This provides no added benefit to the customer, so may be difficult to justify with the purchasing department? It would be additional cost that would be difficult to recoup.