can do tricep curls with tins of beans or bottles of water too.
but tbh, once the fat goes there shouldnt be much flapping going on bar a bit of skin maybe. Ive got this cream which I think really works at tightening skin up (I sound like some cheesy advert here) its a 'soap and glory' one from boots called firmiator or something like that.
Also Im doing pilates and we do some tricep work using resistance bands, mine were aching the next day!