Silicone lubricant is a fan favorite for good reason: it stays slippery, it's skin-friendly, and it doesn't quit on you halfway through.
Unlike water-based lubes, silicone doesn't dry out mid-session, so no awkward pauses. It's colorless, odorless, and works beautifully in water, meaning bath time and shower fun are fully on the table.
A few things to know before you dive in: silicone lube is compatible with latex condoms, which is great, but it doesn't play well with silicone toys, so keep those separate. It also doubles as a massage gel, which is always a nice bonus.

Store in a cool, dark place and keep out of reach of children.