I bought these for a cruise to take our own liquor on- split the package with my family because we for sure did not need THAT much booze…geesh! However, we each took a few and it worked! We got on the boat, into our rooms and into our cabinets with no trouble at all. We followed the directions to the T that came with the package- be sure to do that. The directions are easy breezy! And so much cheaper than having to buy all of your drinks on the boat! They did not leak once and it comes with a funnel to get the liquor in there. These babies will get plenty of use as we like to cruise each winter!
Check out the link and buy them for your trip! Ahoy!