i doubt it somehow, there is no need for a formula roadshow what the formula companies SHOULD do is give clear instructions and advice on the product esp about mixing it with 70 deg water and explaining why etc, then they can say how to make it up in advance safely, ie hot water, cool quickly under running tap and then in the fridge or make it up when needed and cool quickly.
your hv should be able to tell you that babies dont need water tho some still say they can have some when its hot etc. its a bit of a discussion point on mnet sometimes as some are dead against water for ff babies and some say a few sips etc is fine, i cant remember the science behind it but basically formula that is properly made up will give a baby all the water they need. and there is concerns about electrolite (sp) balances etc when a baby has too much water.
roadshows and freebies are just bollocks, proper information on a product and with regards to mixed feeding i think its one of those things where you would have to judge by your own child, ie think about what feeds you adn they most enjoy, when it would be convenient for you adn baby to doa bottle and then offer one, they recomend an amount on the packet depending on age/weight of baby but i would go with a small amoutn 2-3oz fora bfed baby to begin with and be guided by them i guess. bfeeding is about much more than food, they dont just bfeed when they are hungry which is why some bottle fed babies are happier if they can have a dummy/suck a thumb for that extra comfort.
i wouldt ask a formula company for advice on mixed feeding because they know little about the reality of bfeeding and their advice is likely to be crap tbh, a bfeeding counsellor would be of more help and equally your hv should be able to help, but again not all are that good on bfeeding.