Dan Bergsma Art Glass Vase Signed Numbered Hand Blown Cased Sea Green Swirls 13 This exquisite Dan Bergsma Art Glass vase, with its unique sea green swirls with cased design, is hand-blown and polished to perfection. Its beautiful sea green color with swirls makes it a standout piece for any space. The piece is signed by Dan Bergsma and numbered No. 808 It's 13" tall and about 5.25" wide and weighs a whopping 4 lbs 13 oz, and did I say it's gorgeous?