Fill a water balloon
Python 2, 591 bytes

Took me some time and it probably could be golfed much more.

Hope there aren't any major errors.

r=[list(x)for x in ("|          |!"*10+"+----------+").split('!')]
s,t=[0]*4+[1]*2+[2]*10+[3]*4+[4]*16+[5]*6+[6]*22+[7]*8+[8]*29,[(4,2,2),(4,3,2),(3,4,4),(3,5,4),(2,6,6),(2,7,6),(1,8,8),(1,9,8),(0,9,10)]
a,b,c,d,e='|','/','\\','_','#'
def p(x,y,w):r[y][x]=w
def q(l):
 h,j,u=l
 p(5,0,a);p(6,0,a)
 for o in range(4-h):p(h+o+1,0,d);p(h+u-o,0,d)
 p(h,1,b);p(h+u+1,1,c)
 for o in range(j-2):p(h,o+2,a);p(h+u+1,o+2,a)
 p(h,j,c);p(h+u+1,j,b)
def w(i,l):
 h,j,u=l
 for o in range(i):x,y=o%u,o/u;p(h+x+1,j-y,e)
def f(i):
 n=s[i]
 l=t[n]
 if n&lt;8:q(l)
 w(i,l)
 print "\n".join(["".join(x)for x in r])


Example run:

f(34)


gives:

|  __||__  |
| /####  \ |
| |######| |
| |######| |
| |######| |
| |######| |
| \######/ |
|          |
|          |
|          |
+----------+