If you want to use it in the bath: check for IPX7 or "fully submersible." IPX6 and splashproof toys are fine in the shower spray but not under water.
If you want hands-free play: pick a suction cup dildo or a wearable couples vibrator. Suction cups hold best on smooth, dry tile, so press it on before the water hits that spot.
If you are choosing lube: use a silicone formula. Water rinses water-based lube away quickly. Silicone lube lasts longer in water but can damage silicone toys, so pair it with glass, metal or ABS toys, or test it on a small spot first. Shop silicone lube.
If you are new to shower sex: start with positions that keep your feet planted. Our guide to shower sex positions covers the ones that work on wet tile, plus grip and safety tips.
Whatever you pick: rinse and dry it fully before storing, and make sure the charging port is dry before you plug it in.