Here’s a handful of images of Potions for you, all created using the Soft Drink Can Generator. There’s one for each Potion listed in the 4e PHB and I’ll make up more from the Adventurer’s Vault if there’s enough interest.
Print them out, cut ’em out and give them to your players for them to “drink” whenever their characters feel the need.
Enjoy :D !
UPDATE: Here’s a handy zipfile of the images: healingcans.zip (89k)