Double pool floats come in all sorts of shapes and sizes.
There’s the classic design which allows both users to sit, facing each other with their feet wading in the water.
There’s another variety in which both users sit facing the same direction. Loungers allow both users to lie down comfortably.
Recliner pool floats or chaises allow the user to sit up and recline. These usually have a cup holder for beverages and a snack tray integrated into it.
Baby double pool floats are designed for safety and allow the parents to tuck in the babies in securely. These are typically made of a thicker material and will rarely capsize, get deflated or fray.
If the pool isn’t covered, you might want to consider one with a canopy to protect the babies from sun exposure.
Lastly, you have the family pool float which is like a large whitewater raft and fits an entire family comfortably. You need a large pool to accommodate one though.