I make soap cupcakes, and I've been using another vendor's smaller pastry bags, which have been adequate for my purposes. However, when you have a batch of soap batter made, you have to move fast before it hardens into a solid rock. Taking time between piping cupcakes to refill a small, 12-inch bag is messy and wasteful, both of time and materials. Not mention frustrating, soap and slippery!These are generous, sturdy bags, and are ideal for piping soap batter comfortably, easily and quickly. I read a lot of reviews on disposable pastry bags before purchasing them, and decided on these because reviewers mentioned that they were a nice thickness and held up well.You don't need a coupler on these if you don't plan to switch tips. You can fill them up with a such a generous amount of batter, that your arms will get tired while you pipe!I thoroughly recommend these bags over any others, for price, quality and delivery speed.