Stainless steel cap of cocktail shaker stuck...

Only suggesting because the item you mention is metal...I'm also assuming that the lid is screwed onto a glass container...Have you tried soaking the seal / seam with Coca-Cola? If there is the slightest bit of rust in the grooves perhaps the Coke would loosen it up. Also, instead of soaking the lid and jar it's attached to, have you tried running very hot tap water (straight from the faucet) over the lid ONLY and not the container? Soaking both in hot water encourages both materials to expand the heated molecules, but focusing the hot water primarily on the lid only might allow for the lid molecules to expand more rapidly than the container, allowing for easier movement.

Use cold water and you're rubber thing and it should come off, cold should make it shrink some

It sounds like it's wedged between grooves, and since you've tried all the right things it may be time to replace it.

Would one of the products at the hardware store work? The ones for loosening screws? I would take it to the store since most times the people there love a challenge!

spray WD40 using the attachment, let sit and redo as often so it soaks inside the rim. Could take several sprays. its corroded

I would dip the top in an oil, let it set to allow penitration on the cap. Put the shaker in a pot of water top side up, and bring to a boil. the air inside will expand and hopefully loosen the cap, Let it cool and then tap the cap on the edge of the sink while turning the shaker. Good Luck.

Try putting the bottom in ice sold water, then the top in really hot water and try to turn it immediately. The cold should shrink the bottom and the hot expand the top. It is worth a try! It has worked for me with stuck jar lids when I have taken them out of the fridge.

Try putting it in the freezer for a while. The metal will contract a bit; might be enough to loosen.

Try the hot water trick, then tap the side of lid on the side of a counter.

This works most of the time.

You can also try the old jar trick. Run just the top under hot water, then give it a good tap on the kitchen floor. Works on top of pickle jars

Put it in your freezer for several hours.

Go to your local auto repair guy and ask him to remove it the same way he would remove a stuck oil filter. There is a strap like device that goes around it and has a lever/handle

I go with WD40 solution. Turn it over and liberally spray WD40 with the tube. Let it sit for a while for the WD40 to penetrate.

Thanks, Will...will do...;)

Make the inside part hot and the outside cold- or maybe reverse- one will expand and the other contract.

Well, I finally got the cap off:) I tried the WD40 as suggested and let it sit for a bit. I still could not budge the darn thing however. Then I had a brain storm. There are these little air vent holes in the cap (the one stuck to the lid of the shaker) so I turned the whole lid upside down and then got a tiny screwdriver and inserted it into the middle hole, got a hammer and lightly tapped a few times, then Wahlah off it came! Not sure if the WD helped the process or it would have come off this way anyhow, but, thank you all for your help and suggestions!!:) Now, who want's a martini?! LOL.

Next time just hit hard the side of the shaker on a hard surface. I had been fighting for hours with a jammed lid going over tips from this and other webpages until a barman walked in and did the trick in a split second.

Lots of great ideas here! I have a three-piece cocktail shaker and was struggling with the cap being stuck to the strainer piece. What worked for me was to place the strainer and cap into a bowl of ice water. While it was soaking in the ice water, I boiled a little pot/saucepan of hot water. Once it was at a good rolling boil, I took the strainer & cap out of the ice water and dipped the cap only (maybe only halfway) into the boiling water for only about 3 seconds. I then quickly pulled the cap off very easily! Hot tap water didn’t work for me, hence the pot of boiling water. Thanks all for great ideas!

My top cap was stuck to the strainer. I tried everything, but this worked easily - I turned it upside down and inserted the head of a small philips screwdriver into the strainer holes, then with a hammer, tapped into a few different holes against the underside of the cap. (naturally, you have to be holding the strainer/cap and small screwdriver in one hand) After tapping into three or four holes, the cap popped off. (and yes, there was a little rust around the circumference)

I was having this problem for days. When I finally got the lid off, I found the situation pictured below. Check this before freezing, heating, pounding and WD40ing...all of which I tried before I got lucky. I was about to trash it! Ha!

Freeze it

Omg! Worked a treat! Put some cooking oil in the lid. Let it soak for a while and put just the top in hot water . Used a small screwdriver in the lid, turned upside down and knocked off the pavement ! Off it popped . Thanks. Will keep inside the lid lubricated with cooking oil going forward

He there. Did you ever get the top off? I have a metal cocktail shaker and mine is stuck. It's the top it's kinda old. Do you have a picture of it? This is mine. HELP!!

I've tried all the methods above (hot/cold/screwsriver/WD40) but nothing worked, then I got some genius advice that worked like wonders here.

I filled the part with water just above filter holes, and put it in the fridge. Since everything is made of metal, the water froze on all the parts that touch the metal first, including the metal grill with the holes. When the inner part eventually froze, it expanded, but had to push against the frozen water around the filter, which left the cap no choice but to pop off!

Try heating the top portion with a hair dryer while setting the bottom part and some cold ice water be careful not to get the cord in the water and have some heat resistant gloves but that should heat the top enough to allow you to turn it and get it back on track and possibly off the shaker