JOIN USIt was Bangladesh's second successive win, but Zimbabwe still claimed the series 3-2 to add to their victory in the one-off Test between the two nations.
After being put in to bat, Bangladesh made 253 for six in their 50 overs before Zimbabwe, who lost captain Brendan Taylor for a duck in the second over, were skittled out for 160 with more than 11 overs to spare.
"All the boys showed some character that we are not here just to play the game. The newcomers have shown lots of promise, our fast bowlers have done well throughout the series," said Shakib.
"Everything came well in the last two games. We were coming off a break from international cricket, so it was not going to be easy for the guys."
Taylor said there were many positives to take from the series, which had started with Zimbabwe's first Test appearance in six years.
"Bit disappointed with the way we ended but pretty chuffed with the series win, we will enjoy it," he told cricinfo.com.
"We played well as a collective unit, the guys put their hands up and batted deep, bowlers did well and we fielded well. We are in a good place right now and it is nice to have options." Bangladesh had been 125 for five at one stage before Shakib, whose 79 came off 71 balls and featured five boundaries and a six, put on 109 for the sixth wicket with Mahmudullah who made 60.
It was Shakib's 21st one-day century.Mahmudullah was undefeated at the end of the 50 overs with his runs coming off 67 deliveries with five boundaries and a six to match his captain in the big hitting.
Mahmudullah went on to claim three wickets with his off-breaks for just 13 runs.
Flamboyant opener Tamim Iqbal also confirmed his return to form with 45 but Mohammad Ashraful, brought back into the side, made only 15 while Imrul Kayes concluded a dismal tour with nine.
The innings ended in worrying circumstances when Zimbabwe seamer Keegan Meth took a full blooded drive on the jaw when half-way down the wicket after bowling a high full toss.
X-rays showed no fracture though he lost two teeth and another was chipped and his injury prevented him from batting.
In Zimbabwe's reply, Taylor was caught behind for a duck off the first ball of the second over. It was his fourth failure after smashing a century in the first match.
Vusi Sibanda and Hamilton Masakadza dug deep and they put on 57 for the second wicket.
But when they went, and the experienced Tatenda Taibu was lbw to Shakib, Zimbabwe were 73-4 and the game was effectively up.
Malcolm Waller, after surviving a missed catch, went on to make a steady 51 off 78 balls, his second career ODI half century.
But Elton Chigumbura, on whom so much rested, was caught for one and the Zimbabwe tail collapsed. Zimbabwe will face a tougher test next month when Pakistan arrive for one Test, three ODIs and two Twenty20s.
Score board
BANGLADESH
Iqbal c Chigumbura b Price 45
Kayes c Taibu b Meth 9
Ashraful c Taibu b Chigumbura 15
Rahim c Sibanda b Price 20
Shakib b Meth 79
Shuvagoto c Waller b Price 3
Mahmudullah (not out) 60
N Hossain (not out) 8
Extras (LB-3, W-11) 14
Total (for 6 wkts, 50 overs) 253
Fall of wickets: 1-30, 2-70, 3-79, 4-119, 5-125, 6-234.
Bowling: Mpofu 10-1-53-0, Meth 10-0-56-2, Chigumbura 9-0-44-1, Utseya 10-0-39-0, Price 10-2-51-3, Waller 1-0-7-0.
ZIMBABWE
Taylor c Rahim b R Hossain 0
Sibanda c Iqbal b Shakib3 4
Masakadza lbw Razzak 28
Taibu lbw Shakib 7
Mutizwa (run out) 27
Waller c Kayes b Mahmudullah 51
C’mbura c Kayes b Mahmudullah 1
Utseya c Razzak b Mahmudullah 7
Price c N Hossain b Islam 0
Mpofu (not out) 0
Meth (absent hurt)
Extras (LB-1, W-4) 5
Total (all out, 38.2 overs) 160
Fall of wickets:1-2, 2-59, 3-73, 4-73, 5-140, 6-145, 7-160, 8-160, 9-160.
Bowling:Islam 6.2-0-26-1, R Hossain 6-0-34-1, Razzak 9-1-31-1, Shakib 7-0-26-2, N Hossain 4-0- 18-0, Ashraful 2-0-11-0, Mahmudullah 4-0-13-3.