Price tags are a necessary item, make them as attractive as possible. Do not use white string or the large product tags from Walmart. I use gold quilter's thread on my coffee scoops; it is quite strong and hardly noticeable.  On your bottle stoppers, tie the string around the stopper above the top o-ring so it doesn't cover or interfere with your design creation.
These tags are free to use and make any changes you like. Stainless-Stoppers  Bottle Openers   Bourbon or Whiskey.Stoppers
You may also like these tags: Espresso.Tamper     Meat Tenderizer.Garlic Press    Can Tab Pull
Marketing Tips
Attractive Price Tags
Say It This Way
If you use my bottle stoppers, feel free to take any wording from my site to promote them. People understand FDA approved kitchen-grade solid stainless steel with a lifetime guarantee and they understand it will cost a little more. Most also love to know your item is 100% made in America.
Have a sign saying these stoppers can be used for oil and vinegar, bath oil bottles as well as wine and whiskey bottles. Have an olive oil bottle with a stopper in your display, not everyone asks questions; people will get the idea and maybe even think of other uses which means more sales.
Show Work-in-Progress
Show customers your work in progress either by using pictures of progressive steps or have pieces of your work in various stages of completion, It also shows why your work is priced more than Walmart!  Here is how Karen Sheldon in SC shows a very simplified version of her work. You might also have a tool or two to show how they are used.
More Places to Sell Stuff
Many libraries, banks, community centers and visitor centers have monthly displays in their lobby or entry hall. See if you can either do a display or contribute to one. For example; the local Extension Service was having a "Native Trees of PA." display at my local library. They had books, pictures, a few leaves and some bark from each species. I offered to turn small items from each wood. Every library patron saw my work with my name for a month. The library advertised the exhibit including my turnings..... free advertising!
Get Some New Ideas
At Craft Fairs, after your booth is set up, walk down and around another isle and observe booths that attract your attention. Don't look at what they are selling, rather how the display looks to you as a customer. As you approach your booth, try to see it as a customer. Things to consider; color and openness (welcomes browsing), extra stock stacked in the back rather than on or under a table (too much to look at). Also consider moving a few things around in the afternoon, items previously overlooked might get someone's attention. If the customer doesn't see something to attract them in 5 seconds, they walk on by.
Bring that customer back
How many times do you hear "I'll be back". This is a "be back" tip: take one of your business cards and write "10% Discount" on the back and write the first name of the customer that almost bought something then said they would be back.  Or write a 10% discount code on the back of your business card and tell the customer it's a one-time offer to cover postage when they order from your website.
Hotels – A Selling Opportunity
Hotel gift shops and airport gift shops are an excellent venue as many travelers love to buy a gift from where they are traveling. "Handmade in Dallas, TX" (example) on the tag makes your item the perfect gift.
Consider Designer and Retail
If you make bowls, vases, etc., check with fine furniture stores. They have rooms arranged with desks, bookcases, etc. A glass artist in Utah does extremely well with sales in this type of store. Your work is not competing with a lot of others and people can picture that art piece in their home. Also they are not price shopping between artists doing the same work.
Exclusives for Specialty Shops
Make an "exclusive" design for each specialty shop. They will promote their very own exclusive design. This would not apply to consignment or gift shops. For example, I do my apple stopper for a local winery that is in the middle of 100 acres of apple orchards. I told them I would not sell that design to another winery within 50 miles. If you have 4, or even 15, wineries within 100 miles, that is a nice number of "exclusive" designs to sell.
Competitors? Or, not.
Other vendors are not necessarily your competition, you compliment each other. If a customer asks if you make bowls with purple elephants, say, "No, I don't but there's an artist in aisle 4 that does. You can mention I sent you" and give them your card. If you have time even walk the customer to that other artists booth and point out the items. If you just say, "No, I don't make that", what reason have you given that customer to remember you? And that other artist may just get a request for something you make that they don't and will send people to your booth. Also that customer will stop at your booth every show and bring a friend to meet the nice person that helped them.
Think of Vertical Markets
Home builders might like to give their customers a nice salad bowl or wine bottle stopper made to match the kitchen cabinets. The glass artists can offer stoppers to match the color scheme of the home. Stone workers can make a stopper from the kitchen counter material. Here are a few examples: A meat tenderizer to match cabinets done by Peter Vines and the bottle stoppers John Schick made from marble a granite counter top material.
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Expand Your Visibility
If you have a website, try to link with fellow artists, vendors and collectors. Don't add links just to have a lot of them. After going to a few irrelevant links, people move on to another site. Your links reflect you and your art.
New Sales Opportunities
Try gourmet kitchen shops or flower shops that make gift baskets. They can sell your items separate or make a gift wine basket or gift bowl with flowers that will be used long after the flowers have died. You probably won't sell a lot of items but it is another venue. Remember, market your stoppers for oil and vinegar cruets as well as wine bottles.
Simple, Attractive Packaging
For your booth at a show, tie a stopper to a bottle of wine with a fancy ribbon. Put a small sign saying something like "wonderful way to give an heirloom stopper to a favorite wine lover." Using the word "heirloom" suggests future gifts and adding to a collection.
Think Like a Customer
This is from an article in Crafts Report. "Make what the customers want to buy." Sounds simple but a lot of woodturners (for example) make items that are "woodturner's challenges" but not really practical for the average person. Take a small trinket box, a vacuum-type fit is impressive for the turner but the user has to lay the items down and use two hands to open the box. They want to pick up the lid with one hand.
Enhance Show Displays
Have an empty wine bottle and vinegar cruet in your show booth so people can see how nice a stopper looks in a bottle. Remember, there are people who don't drink wine and might just pass by but if you show them other "bottle stopper" uses, you will get another sale. Many designs are more attractive in the bottle than either laying on the table or in a display stand with a dozen other stoppers.
For example; I make a door-knob shape stopper that isn't exactly an attention getter in the display but when people try them in the bottle, they look nice and are very hand friendly. It's a quick, simple design that you can add cabochons, coins, buttons, inlays, etc. on the top to create unique or individual designs.
Focus Your Customer
If you do wood stoppers with a wood display stand, paint the stand white. Each stopper will stand out more. Too much wood on wood can be distracting.
Show the Process
If you work with wood, have a "process" display; a square blank, a partially turned bowl, box or anything you make. Have a few tools, too. You know you are going to be asked "How did you do that?" Showing, rather than just describing your process will impress and help make sales.