I have yet to figure out a use for my empty vials. I've been keeping them as they seem useful for something I just haven't figured it out quite yet.
Have you seen the Chalkboard tap handles? I think they're pretty sweet.
Did you know that you can save them up and return them to Whitelabs for different things?
10 vials: Coupon for a FREE Vial
15 vials: White Labs Glassware
20 vials: Classic Beer Styles Series Book (choose one) Altbier; Barley Wine; Bavarian Helles; Belgian Ale; Bock; Brown Ale; Continental Pilsner; German Wheat Beer; Kolsch; Mild Ale; Oktoberfest: Pale Ale (2nd Edition); Porter; Scotch Ale; Smoked Beers; and Stout. Other Brewers Publications titles available upon request (number of vials may vary due to retail price of publication). Non Brewers Publication items from the BA on-line catalog are not available for this offer.
30 vials: White Labs S/S T-shirt OR baseball hat
45 vials: White Labs Short Sleeve Polo Shirt
60 vials: White Labs Hooded Sweatshirt
75 vials: Long Sleeve Denim Button Down Shirt
125 vials: Brewmaster: The Craft Beer Game OR (1) year subscription to Brew Your Own magazine
5000 vials: Chris White will come to your house, bring the yeast, and brew with you.