Well, you do have aqueous solutions of silver or aluminum salts, but that is probably is safe enough in that amount. And you really should recycle that glass.
And do not use liquid Drano! Or be very careful when adding it to the acid. For that matter, be careful with the dry stuff, too. Careful as in wearing gloves and eye protection and from at least a meter away. The acid kobolds will jump out and mess you up real good.
Well, my own house elementals mostly just steal stuff now that I’m better medicated and don’t have cats for them to play with (no love lost between them and the dogs), but acid kobolds are no one to mess with.