New York Toy Collective's Rechargeable Bullet has ten modes, an hour of use per charge, recharges in half an hour, and is made of silicone and ABS. It's IPX6 waterproof (which means it can resist high pressure and heavy sprays, so your bath is fine) and totally body safe. It's an inexpensive and powerful way to add vibration to a NoFrillDo with a bullet vibe slot Frill or any Funkit Toy with the Pommel attached, or just play with it on its own! Recharges via regular-old USB and comes with a cable and box.