Double-edge safety razors aren’t just for Grandad: they’re cheap, effective and a joy to use
Couldn't recommend safety razors enough. The handle lasts forever and I worked out that from the pack of razors I bought will last me until the end of my life.
The initial price might seem high but it's a one time cost for life.
I use the standard merkur shave but there are quite a few options in the link article!
Sounds like your already opting for a zero waste option to me! If you do decide to take it back up again this is a great swap, actually a better shave as well