It contains a seemingly random selection of parts that don't build anything in particular. However, as you might guess from the set's name, they have another use...
The parts inside are provided so you can build your meal, or rather order it, at the Mini Chef restaurant on the ground floor of the the LEGO House.
Here's the menu. Each part in the bag represents a menu item.
169DKK is £20 or US$26, so it's not a cheap meal by any means, but then eating out in Denmark never is.
At the table you'll find the bag of bricks and a 'cassette' built from LEGO along with your knife and fork. There's also a tablet mounted at the end of the table into which the cassette is inserted once you've built your meal.
So, how do you order? Simply snap together the four bricks representing the meal you want, or if you're undecided you could choose one of the minifig favourite combinations shown on the back of the menu.
The relative positioning of the parts is not critical: they can be connected any way you like.
When you've made your choice, you mount the four parts on the cassette and slide it into the hole at the bottom of the box.
Here's Gaetan from LCC constructing his order. Look like he's gone for the fried codfish and soba noodles...
Once you've inserted the cassette, the machine interprets your order and asks you to confirm it. 10 minutes or so later the tablet announces the arrival of your meal and you can watch it being delivered from the kitchen in a box down the spiral conveyer at the back of the counter before these robotic guys push it towards the front for you to collect.
New Elementary's video shows the the ordering process much better than I can describe it:
The polybag: Nothing special but a unique memento of your visit to the house. If there's more than one of you dining and you want to keep some sealed, just open one of them. If everyone in your party wants to go home with a sealed one, take the appropriate bricks from your collection with you! The inventory is here. Note that the inverted slopes must be for future expansion of the menu as they are not used at the moment.
The dining experience: Ordering is innovative and fun, typical of every experience in the House. Food is delivered in a 4 compartment stacking box with studs on (what else...) which is cool, but does make actually eating it more difficult than it should be. I didn't think to take photos of mine, but here's one from ACPin on Facebook:
The food: It could have been better. I didn't order the same as ACPin: I had the red 1x2 slope, blue 1x2, green 1x4 and black 1x1. The fried items had been standing for a while so were not as good as they could and, frankly, should have been, for the price of the meal. Maybe once throughput in the kitchen increases the food quality will too.
Overall then, it's not a cheap polybag to obtain but it does of course come with food which is handy if you're at the house all day! If you're lucky, the waitress will give you a 40295 LEGO House Chef for your collection, too.
It's a restaurant experience like no other and one you have to try when you visit, despite the price. You can eat there without paying to enter the house's experience zones should you wish.
You can book a visit from the house's official website.