I have for ten years (S.E.UK) used an old plastic coal bucket with a lid(strong!) that is kept in a large laundry container dustbin shaped in the bathroom.the lower half of the container has the sawdust in it(free from a local furniture maker). The coal bucket sits on a plastic grid to keep the sawdust of it. The 'coal' bucket is put in the toilet,toilet used in the crouch position,best for most efficient bowel evacuation. The bucket when nearly full is emptied into the compost heap interleaved with the prunings from evergreen wall plants kept in the compartment beside. There is no smell in the bathroom or garden.the walnut sawdust was the best unfortunately they only have pine at present which is a bit dusty! Bedsit tenants who use the bathroom thought it was a laundry container until I explained.The fact that I am a mostly raw food vegan may partly account for the lack of any smell though I dont think so. The compost bin lower contents are removed after about a year after it fills up, somewhat sticky and loaded with worms and a miriad of other creatures.placed on the garden late winter, as new loads are added various fungi are sometimes growing. The heap is always warm which doesnt seem to discourage the worms though they dont like the addition of urine,wriggle furiously but dont seem to come to harm as a result. Sometimes mice take up residence no doubt to eat undigested seeds!but go when the compost is removed. A plastic nappy bucket could be used though the stonger old coal buckets are more secure,you wouldnt want one to break in transit! The compost bins are some distance from the house but would be o.k. close due to lack of any smell. We are lazy gardeners and self seeding New zealand beet leaves,rocket,coriander,fennel grow lush and plentiful,Resident hedgehog and frogs from two ponds I assume account for the abscence of slugs,the neighbours cats,which I am constantly at war with unfortunately keep birds away from dealing with snails but they dont do much damage. Chilli powder is the only mostly successful cat deterrent I have so far found.