Piping without the ooze

I make a lot of cupcakes - big creamy swirly ones - which calls for reliably strong, ooze free piping bags. I've tried many and I've had a lot of frosting on my shoes. Then I found these: Lakeland "Get a Grip" piping bags  - amezzin!   Super strong and very grippy, so even if you do get a (rare) ooze it won't be like icing with a wet bar of soap!