Is it bad to drink through a straw after fat grafting?

Had full facial fat transfer 3 days ago, including lips. Because of the swelling I find it more comfortable to drink through a straw. I wonder would it be bad for the fat grafts since I think that uses the lip and buccal muscles? I find icing or a cold shower after a hot shower helps reduce swelling but would that hinder fat survival? I dont want to take chances as this is already my second fat transfer. The first one did not take as well as I want it to. Thanks