What's your favourite swag that you actually wear/use?

Thinking of having some Farcaster swag made & looking for ideas.

(if I pick your idea I'll send you some swag)

Building open source via @frames, /open-frames to help Farcaster and decentralized social win. a16z CSX23. Side proj: farcasterchannels.com farcaster.id @search

citizenship @optimism, dreamer, optimist, dog parent. Formerly @beondeck co-founder @otterspace product @soundcloud philosophy 
@univofstandrews

Founder /kiwi-news, a decentralized Hacker News