I have a huge tupperware type container that fits just over 10 nappies (so airtight) that has a handle and an indent on the bottom so you can tip it easily.
Because it was see through plastic I covered it with sticky back plastic to match the room.
They were also very cheap - about 2.50 each from the rangeand I have 2, 1 upstiars and 1 downstairs.
I looked for ages as I couldn't find a nappy bin with a lid that stays on, dh is disabled and so was worried about sending nappies flying across the floor - not a nice thought.
Good luck this was the last thing I bought and the most difficult to find, sounds stupid but…
sarie