So you're telling me to pour lava over my handy-dandy lava garbage can?
Well if you don't like the lava noises you could use a cactus as your garbage can. It is much better and safer if you accidentally fall in. Just dig 3 down, put a sand on bottom, clear out the sides of the bottom so cactus can be placed, get out of the hole and put a trapdoor over it. Or make a simple lever activated sticky piston but I think the trapdoor is good enough.