What Is It? game 198

It's once again time for our collaboration with the always amusing What Is It? Blog. Can you guess what the pictured item is? Can you make up something interesting?

Place your guess in the comment section below. One guess per comment, please, though you can enter as many as you'd like. Post no URLs or weblinks, as doing so will forfeit your entry. Two winners: the first correct guess and the funniest (albeit ultimately wrong) guess will win T-shirt from the NeatoShop.

Please write your T-shirt selection alongside your guess. If you don't include a selection, you forfeit the prize, okay? May we suggest the Science T-Shirt, Funny T-Shirt and Artist-Designed T-Shirts?

For more clues, check out the What Is It? Blog. Good luck -you're going to need it!

Update: the pictured item is a "beer growler." It's a container used to carry draft beer home before the use of bottles. See a picture of them being filled at the What Is It? blog. Red Neptune was the first commenter who knew the answer, but did not select a shirt. The funniest answer? Oscar the Grouch's starter home, you know, when he was little. Cristal was the first of several to suggest this one, so she wins a t-shirt from the NeatoShop!