Leuchtturm-Stapelbecher

The water spinner on top is the best part — my daughter watches the rain fall through the holes for ages. Cups stack neatly for storage, and they're sturdy enough for bath after bath.

My toddler grabbed these in the tub and immediately figured out the stacking and nesting part, but the real hit is pouring water into the top cup to watch it rain through those holes. They nest down super compact for storage too, which keeps our bath caddy from overflowing.

The water spinner on top is such a clever touch—my kid loves pouring water through it and watching the rain trickle down the cups. They stack and nest easily, so cleanup takes seconds, and the whole set gets used every single bath.