This is a review of the Tommee Tippee Sangenic Compatible Cassette which we buy to fit our nappy wrapper bins - I've reviewed it recently if you want to read my views on it. It's a bit like when you buy a cheap printer and then commit to a life time of buying expensive ink cartridge refills that cost more than the printer in the first place! What are they? The cassettes are a refill which sit inside the neck of the bin and dispense a long tube of thin plastic which you place used nappies inside. You twist the neck of the bin to seal each nappy in to a sausage link inside the bin and eventually the plastic wrapper runs out and you need to refill. ...  Read the complete review