What should I do about DIL giving me unsuitable presents?

Think of something specific you would like, such as a plant, bulbs etc for the garden, music DVD, there must be something, or vouchers for a favourite shop. They want to give you something; let them and accept gracefully.

Many thanks for all the suggestions. I shall gradually use two or three of the items. I have already given two away and will do so with the others. I am grateful, but I wish we could go back to not giving or receiving presents either way. Previous years' presents were impossible!
I have never spent Christmas with this part of the family, as they are always with DiL's parents. DS tries to keep in contact, but it is not easy.

I agree. Things are never wasted if they can be given to someone in need.

Regift hamper food to the shelter or food bank.

Try smiling and saying thank you. And if you really can't face a Mrs Bridges hamper, just post it on to me. I'll email you my address
(some people are sooo ungrateful !!)

Yes, suggest something you’d like or as everyone else has said, smile and regift it. I’m off to the charity shop soon with my unwanted presents.

Say nothing and pass on the unwanted items to a food bank.
It's not worth causing a rift, lots of parents don't receive anything from their adult children.

Ask them to buy you a tree from the Woodland Trust or a donkey for a poor farmer in a poor country, or a toilet for someone, again in a poor country, who hasn't one.

My grown up children and I always buy a special little gift for the tree either their favourite perfume or aftershave it is just a token gift for them to open when they visit on the day.
There are so many people who receive nothing and have no families to visit them I'm sure they would be grateful for anything especially a visit.

My sons and I do a Christmas (and birthday) list for adults. We don't get surprises but do get something we like. Other people have learnt gradually that I really don't like chocolate but I do still get more toiletries than I can use but do re-gift.

Smile sweetly, say thanks then pass the goods to charity shop or homeless shelter.
It's not worth upsetting anyone, least of all your DIL and son.

Secret Santa is the answer we started this 2yrs ago and it works well. We set a limit and we each get a person to buy for, everyone does a wish list of things that they would like and instead of 12 presents I only have to buy one it's such a relief. This year I asked for a holdall I was going to buy anyway and a game I like.

Tokens!

It is annoying. I ask for takes but still get wine, chocolates and biscuits. I don't want that or smellies or candles as gifts. I smile but feel it is such a waste of money. I really have everything I need but id like my favoutrite perfume or a book from my book list etc. If it is the thought that counts then I think not much thought went into the choices.

Is there something you'd really like that they could add to each year? I was thinking as I set the table for Christmas dinner that I'd really like matching cutlery. A few bits of a classic design every year would do the trick.
Bird food is my other standby request.

If they are determined to give then I think the solution is to tell them what you would like. Something as simple as a voucher as Maw suggests. You don't even have to keep them if you don't want to but could gift them on.

For myself, Id just smile, accept and regift :-)

Say 'thank you' and be grateful that they give you a gift at all. Either donate to a foodbank or use when you have visitors.

I don't know what you can do about this but, your local food bank would be grateful for the contents, and you could use the hamper as storage, I keep all my dgds treasures in one I have, paintings cards postcards and lovely stuff from over the years that I couldn't bear to throw away

Smile sweetly and regift it and/or say to your son that your willpower is being put to the test, how about a voucher/pot plant/book token/bath and shower gel (name a favourite) in future ?