1) Shaped like a pitcher 2) Urn-shaped 3) Vessel 1) Urceolar 
urn-shaped.
Urceolate literally means `shaped like an urn or pitcher`, with a swollen middle and narrowing top. It is often used in botany to describe a feature of plant morphology. Examples of urceolate plant structures are the pitchers of many species of the pitcher plant genera Sarracenia and Nepenthes. ==Etymology== Mid-18th century. From Latin urceolus.....
urn shaped
pitcher like
shaped like a pitcher
Pitcher-like, hollow and contracted at the mouth like an urn. 
urn-shaped or pitcher-like, contracted at the mouth
Urn-shaped. ... (09 Oct 1997) ... 
urn-shaped or pitcher-like, contracted at the mouth
Urn-shaped.
Type: Term Pronunciation: yūr-sē′ō-lāt Synonyms: urceiform
pitcher like
[adj] - (biology) urn-shaped
adjective urn-shaped; large below and contracted toward the mouth
shaped like a pitcher; swelling out like the body of a pitcher and contracted at the orifice, as a corolla.