My level 42 cassette, a massive double ender, 3 litres of lube, a can of heinz beans with "Ha, I bet you don't have tin openers, have fun opening these ********" written on it and a picture of a cow with a speech bubble stating "Milk me so good" penned in, they can have the biro as well, why not.
I mean seriously, time capsules are a load of nonsense, you find one, go "interesting" than forget about it a few days later. Oh, you buried a roses tin 2 feet down in your back garden? No one will ever find it for hundreds of years... Yeah, right.