I don’t understand making tea in a Keurig, unless it’s because the location does not have very hot water (like a water cooler that puts out hot water), a stove to boil water on or a microwave to heat the water. Otherwise, just put a bag in a cup or loose tea in a ball and add hot water – way cheaper than a Keurig.
@Katniss: Yes, you still need a membership to go to Sam’s or Costco. At Costco, you can order online without being a member (a lot of people don’t know that) but prices may not be as cheap as in the warehouse. For example, you can buy a bed in the warehouse for about $100 cheaper than online, because, I think, delivery is free but the added $100 online is actually a hidden delivery fee. Now, I just ordered a new Dell Inspiron online from them, at a price that the warehouse didn’t have (online they had $100 off, where they did not have that offer in the store). Check Costco online and see if they have K Cups.