toko aqua is good sadly it is out of stock, but toyfluid by fun factory is good for a water lube. Since you definitely want a water lube for a silicone vibe.
Sliquid makes really great water based lubes. My 2 favs are Sliquid Organics Natural & Sassy Booty Formula. Bonus: they are vegan friendly and don't have chemicals.
I would go with any water-based lube, since silicone ones are incompatible with silicone toys. I wouldn't think you'd need anything particularly thick, since this vibe isn't really designed for penetration and seems to be more for external use.
