If you e-filed your return and are expecting a refund, you should get it pretty quickly. The Internal Revenue Service says most refunds are issued in less than 21 days. That's assuming your tax return is complete, has no errors and is not affected by identity theft or fraud. So if it's been more than 21 days and you haven't seen any sign of it, the IRS gives you several ways to track it down.
How long does dry ice last? The question of how long does dry ice lasts does depend somewhat on the purpose it is being used for. As a general rule, it will last for 18-24 hours in a cooler or ice chest, 3-5 hours outside and 15-45 minutes when reduced to a liquid form. If you are storing it in a cooler, make sure it is not an airtight one as when the ice melts, the gases could cause the cooler to burst!
Dry ice is also formed into nuggets, by forcing the snow through stainless steel dies with round holes that are one-eighth to three-quarters of an inch in diameter. The nuggets break off in random lengths of 1 to 2 inches. Dry ice does not melt, but vaporizes, passing from a solid state to a vapor without going through a liquid state. This is called sublimation. The time this takes depends on temperature, air movement and whether the dry ice is in an enclosed area. Dry ice is what is called an expendable refrigerant, which leaves nothing behind when it evaporates, so it is desirable for shipping and storing a variety of foods.