Yeah, I did that every day for a long time and got a couple days out of each bag before they'd get a hole. A couple weeks ago it dawned on me that if I got a stronger bag I wouldn't have to keep replacing them. "How did I realize this" you might be asking? One morning I went to pull the grocery bag containing my clothes out of the pannier and saw it had split - and my clothes were wet - bought one of these. Necessity is the mother of invention or in my case, wet clothes enable the duh factor.