CAS TeDDy not teRRy. Important distinction. Teddy is an artificial fabric a bit like fleece, and like fleece it dries almost out of the washing machine. It also stays lovely and soft if dried over heat, eg on a radiator. They're a bit bulkier than bamboo - and not natural fibres.
Bamboo is natural, organic and extremely eco friendly, naturally antibacterial and antifungal, extremely absorbant and lovely and soft. Bamboo takes much longer to dry though - longer even than cotton and if dried on heat can go a bit hard, like towels. Tumbling them for 10 minutes when first out of the drier will make them nice and soft if you have to dry them on a rad. They're slimmer than teddy.
You can use either, whenever, but having a mix makes it easier to keep on top of washing and drying.
pony's point about her friend can be a problem as there is SO much washing with a newborn - but that's why you need at least enough nappies for one day's use and one day's washing, in which case it's really not a problem. I ended up with 3 day's worth with LC - 2 days to use while one day dried - very easy.
Second hand nappies are easy enough to get hold of and perfectly fine, and very eco, (obv assuming they're in good enough condition) but don't bother with second hand wraps as they don't last as long as the nappies, and may start to leak after one or two babies.
ski oh, yes, sorry, of course I will
Just found that MN has deleted my post - not sure why? What did I write that was wrong?