The incision (or incisions) are closed with dissolvable sutures. Oxalate uroliths are not dissolvable in cat urine. It is available in both granular and dissolvable tablet forms. One U.S. company is marketing oral dissolvable caffeine strips. The dissolvable packets is typically made of polyvinylalcohol (PVA) or a derivative of PVA. The dissolvable pill was invented in 1884 by William E. Upjohn. These are made of collagen and are dissolvable. In 1927, Shirriff introduced the "Flavour Bud", a dissolvable capsule of extract for making jelly. Currently, Star Scientific manufactures two brands of dissolvable tobacco, Ariva and Stonewall.