Amazon offers Prime members the Swimline 6x5-Foot Inflatable Pizza Slice Raft for $19.76 with free shipping. That's the lowest price we could find by $5, outside of other Amazon sellers. (For further comparison, we saw an 8-pack for $181, or $22.63 per "slice," in May.) It features 12-gauge PVC construction, a head rest, two built-in cup holders, and bungee connectors to tie two or more floats together.