Bottle Jack recommendations sought.

Remus

I'm trying to reduce the weight we carry around when caravanning.  At present we carry a Halfords trolley jack.   It's a good piece of kit but it is very heavy.  I want to replace it with a lighter jack.  I see that both B&Q and Tesco have bottle jacks for
sale, both are under the £10 Mark.  Does anyone use either of these (or other makes) and are they any good?  I don't trust scissor jacks having had them bend under the load when jacking up the caravan (when still hitched up).  Any advice appreciated.