Blitz That Blockage Bathroom One Shot Pack 5 "Blitz buster!" Mrs Stephens 05 March 2019 This works really well. Easy to use, as you can pour the granules carefully into the plughole without coming into contact with the chrome surround. It’s like unleashing a bubbling potion! I have purchased several more of these one shot packs to use, as they store neatly without messy and unsafe half used containers to deal with.