A fast and cheap gift for judo sensei?

our last judo practice is the next wednsay (mainly because its a high school club thats why its ending). last year the senior judokas gave my sensei a judo sports bag. im a senior now and i dont know what to give him and i dont have time to buy him a custom made shirt cuz it takes time to make and deliver so do u have any gift ideas i can buy OR make??