Of all the Grumpy Cat products out there, this duvet cover is probably the one that will give you the most amount of warm fuzzies. This could be because you love cats with extremely grumpy facial expressions and it warms your heart, or it could just be because you have a warm blanket with an awesome duvet cover. On the other hand, you know have Grumpy Cat's face to commiserate with if you aren't a morning person.
Available on Etsy by LiveLifeColorfully, the internet celebrity-featuring duvet has a painted portrait finish. This gives your bedding an artsy element in addition to a funny one. Unfortunately, this Etsy shop does not appear to carry any other Grumpy Cat products. But really, if you get the duvet, what more could you want?