Margaritas may have some competition this summer. Sippin’ on Smoothies moves in to quench thirsts, quell hunger and generally be cool. Take the triple threat avocado smoothie that’s paleo, dairy free and contains some fill-you-up richness. Smoothies of seven rainbow layers, blueberry coconut layers, berry-beet combos, glowing green spirulina and carrot cake with fresh carrots, bananas and spices are beautiful, colorful head turners. You say it’s your birthday? Well, there’s a smoothie for that, too. Just keep the lit candle away from the straw.