Yes, another kids’ beverage brand, but Y Water is making a stand by launching in a clever, y-shaped bottle that can be reused as a toy: Rubber connectors called “yknots” are designed to let kids link or stack multiple bottles to make Lego-like creations. A biodegradable hang tag delivers product information for the low calorie vitamin-enriched organic drink in whimsical script and with child-like drawings. Y Water is currently rolling out at Whole Foods, where the yknot connectors will be available at customer service. Bottle design: Yves Behar, fuseproject (www.fuseproject.com). Copolyester resin blend: Eastman Chemical Co. (www.eastman.com).