I use a lot of gravel/grit as drainage at the base of large pots and planters.
Every year when changing pots I lose a lot of gravel as I change the compost and prepare the pot or planter for reuse.
Over the last couple of years I have placed the gravel or grit into a pair of womens tights, this acts like a bag and retains the gravel, now when I change my pots and planters I just rinse the bags of gravel in clean water and retain all of the gravel no mess no waste, I have cut my gravel costs enormously.
give it a go
happy gardening Tonbro