Custom Games & Toys, 11" Standard Latex Balloon - Biodegradable & Helium Quality, Helium quality, 100% biodegradable natural latex balloons, superior Zenith silkscreen printing. Balloons are a cost effective & highly visible way to get noticed! Perfect decoration or attention grabber for any event. Float times are based on properly inflated balloons, actual time varies depending on temperature & atmospheric conditions. Balloon accessories can shorten float time. 14-18 Hr. float time. ... #11STDT $1.46/each.