Anyone know a good old timey whiskey flask brand?

My friend is going to university soon and he’ll be moving to a different city, so I want to get him something to remember me by while he’s away until we can meet up again, and we’ve always been into old timey memorabilia type stuff. The reason I say this is because I wanna buy him one of those flasks that you always see detectives in shows have, where they just pull it out of their inside coat pocket and take a swig. I never see people use these in modern day shows or real life so I assume they’re old timey. I’m not looking for legit flasks manufactured in the 1950s or anything, as cool as that would be, just kinda a gimmick gift that he could just be like “this is cool to own, and I think of my friend whenever I think of it”. So I just wanna know a legit brand that sells good quality ones, nothing like tacky or anything, I’m kinda skeptical of buying stuff online after temu and all of those tacky sites popped up, so if anyone has any Amazon links or anything, lmk! thank you!