I just got my boat 2 weeks ago and bought me two tubes. I got the Big Bertha and the Airhead slice from walmart. The big bertha is a big tube for up to 4 riders. Its comfortable for 3. Its huge. I have not tried the airslice yet. Its basicly a flat donut with handles everywhere, for up to 2 riders. What other fun tubes are there that yall recomend?